Finding the Fourth Proportional to 9,139.05, 13,680.74 and 5,854.43

Step by Step Solution

1. Step 1: Write the proportion equation
   9,139.05 : 13,680.74 = 5,854.43 : x
2. Step 2: Convert to fraction form
   9,139.05/13,680.74 = 5,854.43/x
3. Step 3: Cross multiply
   9,139.05x = 13,680.74 × 5,854.43
4. Step 4: Simplify right side
   9,139.05x = 80,092,837.00
5. Step 5: Solve for x
   x = 80,092,837.00/9,139.05
6. Step 6: Final answer
   x = 8,763.80