Finding the Fourth Proportional to 131,261.31, 196,968.42 and 55,355.20

Step by Step Solution

1. Step 1: Write the proportion equation
   131,261.31 : 196,968.42 = 55,355.20 : x
2. Step 2: Convert to fraction form
   131,261.31/196,968.42 = 55,355.20/x
3. Step 3: Cross multiply
   131,261.31x = 196,968.42 × 55,355.20
4. Step 4: Simplify right side
   131,261.31x = 10,903,226,282.78
5. Step 5: Solve for x
   x = 10,903,226,282.78/131,261.31
6. Step 6: Final answer
   x = 83,065.04