Finding the Fourth Proportional to 142,367.31, 196,471.08 and 78,709.32

Step by Step Solution

1. Step 1: Write the proportion equation
   142,367.31 : 196,471.08 = 78,709.32 : x
2. Step 2: Convert to fraction form
   142,367.31/196,471.08 = 78,709.32/x
3. Step 3: Cross multiply
   142,367.31x = 196,471.08 × 78,709.32
4. Step 4: Simplify right side
   142,367.31x = 15,464,105,106.47
5. Step 5: Solve for x
   x = 15,464,105,106.47/142,367.31
6. Step 6: Final answer
   x = 108,621.18