Finding the Fourth Proportional to 525,618.89, 787,283.18 and 345,500.98

Step by Step Solution

1. Step 1: Write the proportion equation
   525,618.89 : 787,283.18 = 345,500.98 : x
2. Step 2: Convert to fraction form
   525,618.89/787,283.18 = 345,500.98/x
3. Step 3: Cross multiply
   525,618.89x = 787,283.18 × 345,500.98
4. Step 4: Simplify right side
   525,618.89x = 272,007,110,227.52
5. Step 5: Solve for x
   x = 272,007,110,227.52/525,618.89
6. Step 6: Final answer
   x = 517,498.73