Finding the Fourth Proportional to 9,111.15, 13,602.81 and 7,710.27

Step by Step Solution

1. Step 1: Write the proportion equation
   9,111.15 : 13,602.81 = 7,710.27 : x
2. Step 2: Convert to fraction form
   9,111.15/13,602.81 = 7,710.27/x
3. Step 3: Cross multiply
   9,111.15x = 13,602.81 × 7,710.27
4. Step 4: Simplify right side
   9,111.15x = 104,881,337.86
5. Step 5: Solve for x
   x = 104,881,337.86/9,111.15
6. Step 6: Final answer
   x = 11,511.32