Finding the Fourth Proportional to 131,216.90, 196,856.60 and 42,470.42

Step by Step Solution

1. Step 1: Write the proportion equation
   131,216.90 : 196,856.60 = 42,470.42 : x
2. Step 2: Convert to fraction form
   131,216.90/196,856.60 = 42,470.42/x
3. Step 3: Cross multiply
   131,216.90x = 196,856.60 × 42,470.42
4. Step 4: Simplify right side
   131,216.90x = 8,360,582,481.77
5. Step 5: Solve for x
   x = 8,360,582,481.77/131,216.90
6. Step 6: Final answer
   x = 63,715.74