Finding the Fourth Proportional to 9,160.05, 12,633.88 and 7,886.03

Step by Step Solution

1. Step 1: Write the proportion equation
   9,160.05 : 12,633.88 = 7,886.03 : x
2. Step 2: Convert to fraction form
   9,160.05/12,633.88 = 7,886.03/x
3. Step 3: Cross multiply
   9,160.05x = 12,633.88 × 7,886.03
4. Step 4: Simplify right side
   9,160.05x = 99,631,156.70
5. Step 5: Solve for x
   x = 99,631,156.70/9,160.05
6. Step 6: Final answer
   x = 10,876.70