Finding the Fourth Proportional to 745,279.98, 1,029,688.83 and 519,931.50

Step by Step Solution

1. Step 1: Write the proportion equation
   745,279.98 : 1,029,688.83 = 519,931.50 : x
2. Step 2: Convert to fraction form
   745,279.98/1,029,688.83 = 519,931.50/x
3. Step 3: Cross multiply
   745,279.98x = 1,029,688.83 × 519,931.50
4. Step 4: Simplify right side
   745,279.98x = 535,367,657,915.15
5. Step 5: Solve for x
   x = 535,367,657,915.15/745,279.98
6. Step 6: Final answer
   x = 718,344.34