Finding the Fourth Proportional to 131,756.96, 181,822.80 and 72,140.96

Step by Step Solution

1. Step 1: Write the proportion equation
   131,756.96 : 181,822.80 = 72,140.96 : x
2. Step 2: Convert to fraction form
   131,756.96/181,822.80 = 72,140.96/x
3. Step 3: Cross multiply
   131,756.96x = 181,822.80 × 72,140.96
4. Step 4: Simplify right side
   131,756.96x = 13,116,871,341.89
5. Step 5: Solve for x
   x = 13,116,871,341.89/131,756.96
6. Step 6: Final answer
   x = 99,553.54