Finding the Fourth Proportional to 215,142.40, 322,711.54 and 130,926.50

Step by Step Solution

1. Step 1: Write the proportion equation
   215,142.40 : 322,711.54 = 130,926.50 : x
2. Step 2: Convert to fraction form
   215,142.40/322,711.54 = 130,926.50/x
3. Step 3: Cross multiply
   215,142.40x = 322,711.54 × 130,926.50
4. Step 4: Simplify right side
   215,142.40x = 42,251,490,500.94
5. Step 5: Solve for x
   x = 42,251,490,500.94/215,142.40
6. Step 6: Final answer
   x = 196,388.49