Finding the Fourth Proportional to 9,113.31, 12,575.79 and 5,575.77

Step by Step Solution

1. Step 1: Write the proportion equation
   9,113.31 : 12,575.79 = 5,575.77 : x
2. Step 2: Convert to fraction form
   9,113.31/12,575.79 = 5,575.77/x
3. Step 3: Cross multiply
   9,113.31x = 12,575.79 × 5,575.77
4. Step 4: Simplify right side
   9,113.31x = 70,119,712.61
5. Step 5: Solve for x
   x = 70,119,712.61/9,113.31
6. Step 6: Final answer
   x = 7,694.21