Finding the Fourth Proportional to 525,616.89, 787,280.18 and 345,498.98

Step by Step Solution

1. Step 1: Write the proportion equation
   525,616.89 : 787,280.18 = 345,498.98 : x
2. Step 2: Convert to fraction form
   525,616.89/787,280.18 = 345,498.98/x
3. Step 3: Cross multiply
   525,616.89x = 787,280.18 × 345,498.98
4. Step 4: Simplify right side
   525,616.89x = 272,004,499,164.22
5. Step 5: Solve for x
   x = 272,004,499,164.22/525,616.89
6. Step 6: Final answer
   x = 517,495.74