Finding the Fourth Proportional to 9,892.18, 13,650.78 and 5,415.94

Step by Step Solution

1. Step 1: Write the proportion equation
   9,892.18 : 13,650.78 = 5,415.94 : x
2. Step 2: Convert to fraction form
   9,892.18/13,650.78 = 5,415.94/x
3. Step 3: Cross multiply
   9,892.18x = 13,650.78 × 5,415.94
4. Step 4: Simplify right side
   9,892.18x = 73,931,805.43
5. Step 5: Solve for x
   x = 73,931,805.43/9,892.18
6. Step 6: Final answer
   x = 7,473.76