Finding the Fourth Proportional to 525,617.89, 787,281.68 and 345,499.98

Step by Step Solution

1. Step 1: Write the proportion equation
   525,617.89 : 787,281.68 = 345,499.98 : x
2. Step 2: Convert to fraction form
   525,617.89/787,281.68 = 345,499.98/x
3. Step 3: Cross multiply
   525,617.89x = 787,281.68 × 345,499.98
4. Step 4: Simplify right side
   525,617.89x = 272,005,804,694.37
5. Step 5: Solve for x
   x = 272,005,804,694.37/525,617.89
6. Step 6: Final answer
   x = 517,497.23