Finding the Fourth Proportional to 131,494, 181,461.72 and 71,878

Step by Step Solution

1. Step 1: Write the proportion equation
   131,494 : 181,461.72 = 71,878 : x
2. Step 2: Convert to fraction form
   131,494/181,461.72 = 71,878/x
3. Step 3: Cross multiply
   131,494x = 181,461.72 × 71,878
4. Step 4: Simplify right side
   131,494x = 13,043,105,510.16
5. Step 5: Solve for x
   x = 13,043,105,510.16/131,494
6. Step 6: Final answer
   x = 99,191.64