Finding the Fourth Proportional to 9,159.05, 12,632.50 and 7,885.03

Step by Step Solution

1. Step 1: Write the proportion equation
   9,159.05 : 12,632.50 = 7,885.03 : x
2. Step 2: Convert to fraction form
   9,159.05/12,632.50 = 7,885.03/x
3. Step 3: Cross multiply
   9,159.05x = 12,632.50 × 7,885.03
4. Step 4: Simplify right side
   9,159.05x = 99,607,641.48
5. Step 5: Solve for x
   x = 99,607,641.48/9,159.05
6. Step 6: Final answer
   x = 10,875.32