Finding the Fourth Proportional to 131,718.78, 181,770.35 and 71,288.00

Step by Step Solution

1. Step 1: Write the proportion equation
   131,718.78 : 181,770.35 = 71,288.00 : x
2. Step 2: Convert to fraction form
   131,718.78/181,770.35 = 71,288.00/x
3. Step 3: Cross multiply
   131,718.78x = 181,770.35 × 71,288.00
4. Step 4: Simplify right side
   131,718.78x = 12,958,043,445.51
5. Step 5: Solve for x
   x = 12,958,043,445.51/131,718.78
6. Step 6: Final answer
   x = 98,376.58