Finding the Fourth Proportional to 142,315.34, 196,387.61 and 78,649.34

Step by Step Solution

1. Step 1: Write the proportion equation
   142,315.34 : 196,387.61 = 78,649.34 : x
2. Step 2: Convert to fraction form
   142,315.34/196,387.61 = 78,649.34/x
3. Step 3: Cross multiply
   142,315.34x = 196,387.61 × 78,649.34
4. Step 4: Simplify right side
   142,315.34x = 15,445,754,535.49
5. Step 5: Solve for x
   x = 15,445,754,535.49/142,315.34
6. Step 6: Final answer
   x = 108,531.91