Finding the Fourth Proportional to 142,541.50, 196,651.30 and 91,547.15

Step by Step Solution

1. Step 1: Write the proportion equation
   142,541.50 : 196,651.30 = 91,547.15 : x
2. Step 2: Convert to fraction form
   142,541.50/196,651.30 = 91,547.15/x
3. Step 3: Cross multiply
   142,541.50x = 196,651.30 × 91,547.15
4. Step 4: Simplify right side
   142,541.50x = 18,002,865,275.80
5. Step 5: Solve for x
   x = 18,002,865,275.80/142,541.50
6. Step 6: Final answer
   x = 126,299.12