Finding the Fourth Proportional to 1,111,356,284.88, 1,669,107,171.30 and 978,456,259.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111,356,284.88 : 1,669,107,171.30 = 978,456,259.74 : x
2. Step 2: Convert to fraction form
   1,111,356,284.88/1,669,107,171.30 = 978,456,259.74/x
3. Step 3: Cross multiply
   1,111,356,284.88x = 1,669,107,171.30 × 978,456,259.74
4. Step 4: Simplify right side
   1,111,356,284.88x = 1,633,148,359,935,409,408
5. Step 5: Solve for x
   x = 1,633,148,359,935,409,408/1,111,356,284.88
6. Step 6: Final answer
   x = 1,469,509,267.33