Finding the Fourth Proportional to 9,892.31, 13,651.16 and 5,415.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,892.31 : 13,651.16 = 5,415.98 : x
2. Step 2: Convert to fraction form
   9,892.31/13,651.16 = 5,415.98/x
3. Step 3: Cross multiply
   9,892.31x = 13,651.16 × 5,415.98
4. Step 4: Simplify right side
   9,892.31x = 73,934,314.20
5. Step 5: Solve for x
   x = 73,934,314.20/9,892.31
6. Step 6: Final answer
   x = 7,473.92