Finding the Fourth Proportional to 142,293.22, 196,377.06 and 78,643.31

Step by Step Solution

1. Step 1: Write the proportion equation
   142,293.22 : 196,377.06 = 78,643.31 : x
2. Step 2: Convert to fraction form
   142,293.22/196,377.06 = 78,643.31/x
3. Step 3: Cross multiply
   142,293.22x = 196,377.06 × 78,643.31
4. Step 4: Simplify right side
   142,293.22x = 15,443,742,006.47
5. Step 5: Solve for x
   x = 15,443,742,006.47/142,293.22
6. Step 6: Final answer
   x = 108,534.63