Finding the Fourth Proportional to 1,987,501.83, 2,980,625.23 and 639,363.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,987,501.83 : 2,980,625.23 = 639,363.88 : x
2. Step 2: Convert to fraction form
   1,987,501.83/2,980,625.23 = 639,363.88/x
3. Step 3: Cross multiply
   1,987,501.83x = 2,980,625.23 × 639,363.88
4. Step 4: Simplify right side
   1,987,501.83x = 1,905,704,111,878.69
5. Step 5: Solve for x
   x = 1,905,704,111,878.69/1,987,501.83
6. Step 6: Final answer
   x = 958,843.95