Finding the Fourth Proportional to 131,873, 181,984.74 and 72,255.72

Step by Step Solution

1. Step 1: Write the proportion equation
   131,873 : 181,984.74 = 72,255.72 : x
2. Step 2: Convert to fraction form
   131,873/181,984.74 = 72,255.72/x
3. Step 3: Cross multiply
   131,873x = 181,984.74 × 72,255.72
4. Step 4: Simplify right side
   131,873x = 13,149,438,417.71
5. Step 5: Solve for x
   x = 13,149,438,417.71/131,873
6. Step 6: Final answer
   x = 99,712.89