Finding the Fourth Proportional to 9,892.17, 13,650.66 and 5,415.03

Step by Step Solution

1. Step 1: Write the proportion equation
   9,892.17 : 13,650.66 = 5,415.03 : x
2. Step 2: Convert to fraction form
   9,892.17/13,650.66 = 5,415.03/x
3. Step 3: Cross multiply
   9,892.17x = 13,650.66 × 5,415.03
4. Step 4: Simplify right side
   9,892.17x = 73,918,733.42
5. Step 5: Solve for x
   x = 73,918,733.42/9,892.17
6. Step 6: Final answer
   x = 7,472.45