Finding the Fourth Proportional to 9,892.28, 13,651.22 and 5,415.99

Step by Step Solution

1. Step 1: Write the proportion equation
   9,892.28 : 13,651.22 = 5,415.99 : x
2. Step 2: Convert to fraction form
   9,892.28/13,651.22 = 5,415.99/x
3. Step 3: Cross multiply
   9,892.28x = 13,651.22 × 5,415.99
4. Step 4: Simplify right side
   9,892.28x = 73,934,871.01
5. Step 5: Solve for x
   x = 73,934,871.01/9,892.28
6. Step 6: Final answer
   x = 7,474.00