Finding the Fourth Proportional to 9,101.79, 12,522.89 and 7,108.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,101.79 : 12,522.89 = 7,108.88 : x
2. Step 2: Convert to fraction form
   9,101.79/12,522.89 = 7,108.88/x
3. Step 3: Cross multiply
   9,101.79x = 12,522.89 × 7,108.88
4. Step 4: Simplify right side
   9,101.79x = 89,023,624.10
5. Step 5: Solve for x
   x = 89,023,624.10/9,101.79
6. Step 6: Final answer
   x = 9,780.89