Finding the Fourth Proportional to 131,782.56, 181,852.56 and 78,072.72

Step by Step Solution

1. Step 1: Write the proportion equation
   131,782.56 : 181,852.56 = 78,072.72 : x
2. Step 2: Convert to fraction form
   131,782.56/181,852.56 = 78,072.72/x
3. Step 3: Cross multiply
   131,782.56x = 181,852.56 × 78,072.72
4. Step 4: Simplify right side
   131,782.56x = 14,197,723,998.16
5. Step 5: Solve for x
   x = 14,197,723,998.16/131,782.56
6. Step 6: Final answer
   x = 107,735.99