Finding the Fourth Proportional to 142,481, 196,617.84 and 78,814.76

Step by Step Solution

1. Step 1: Write the proportion equation
   142,481 : 196,617.84 = 78,814.76 : x
2. Step 2: Convert to fraction form
   142,481/196,617.84 = 78,814.76/x
3. Step 3: Cross multiply
   142,481x = 196,617.84 × 78,814.76
4. Step 4: Simplify right side
   142,481x = 15,496,387,871.32
5. Step 5: Solve for x
   x = 15,496,387,871.32/142,481
6. Step 6: Final answer
   x = 108,761.08