Finding the Fourth Proportional to 9,901.56, 13,663.72 and 5,425.17

Step by Step Solution

1. Step 1: Write the proportion equation
   9,901.56 : 13,663.72 = 5,425.17 : x
2. Step 2: Convert to fraction form
   9,901.56/13,663.72 = 5,425.17/x
3. Step 3: Cross multiply
   9,901.56x = 13,663.72 × 5,425.17
4. Step 4: Simplify right side
   9,901.56x = 74,128,003.83
5. Step 5: Solve for x
   x = 74,128,003.83/9,901.56
6. Step 6: Final answer
   x = 7,486.50