Finding the Fourth Proportional to 9,892.06, 13,651.04 and 5,415.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,892.06 : 13,651.04 = 5,415.80 : x
2. Step 2: Convert to fraction form
   9,892.06/13,651.04 = 5,415.80/x
3. Step 3: Cross multiply
   9,892.06x = 13,651.04 × 5,415.80
4. Step 4: Simplify right side
   9,892.06x = 73,931,302.43
5. Step 5: Solve for x
   x = 73,931,302.43/9,892.06
6. Step 6: Final answer
   x = 7,473.80