Finding the Fourth Proportional to 130,978.62, 196,426.62 and 42,213.15

Step by Step Solution

1. Step 1: Write the proportion equation
   130,978.62 : 196,426.62 = 42,213.15 : x
2. Step 2: Convert to fraction form
   130,978.62/196,426.62 = 42,213.15/x
3. Step 3: Cross multiply
   130,978.62x = 196,426.62 × 42,213.15
4. Step 4: Simplify right side
   130,978.62x = 8,291,786,374.05
5. Step 5: Solve for x
   x = 8,291,786,374.05/130,978.62
6. Step 6: Final answer
   x = 63,306.41