Finding the Fourth Proportional to 10,148.39, 13,978.73 and 7,158.97

Step by Step Solution

1. Step 1: Write the proportion equation
   10,148.39 : 13,978.73 = 7,158.97 : x
2. Step 2: Convert to fraction form
   10,148.39/13,978.73 = 7,158.97/x
3. Step 3: Cross multiply
   10,148.39x = 13,978.73 × 7,158.97
4. Step 4: Simplify right side
   10,148.39x = 100,073,308.71
5. Step 5: Solve for x
   x = 100,073,308.71/10,148.39
6. Step 6: Final answer
   x = 9,861.00