Finding the Fourth Proportional to 774,404.88, 1,068,215.64 and 487,426.80

Step by Step Solution

1. Step 1: Write the proportion equation
   774,404.88 : 1,068,215.64 = 487,426.80 : x
2. Step 2: Convert to fraction form
   774,404.88/1,068,215.64 = 487,426.80/x
3. Step 3: Cross multiply
   774,404.88x = 1,068,215.64 × 487,426.80
4. Step 4: Simplify right side
   774,404.88x = 520,676,931,115.15
5. Step 5: Solve for x
   x = 520,676,931,115.15/774,404.88
6. Step 6: Final answer
   x = 672,357.50