Finding the Fourth Proportional to 142,384.32, 196,490.40 and 78,722.08

Step by Step Solution

1. Step 1: Write the proportion equation
   142,384.32 : 196,490.40 = 78,722.08 : x
2. Step 2: Convert to fraction form
   142,384.32/196,490.40 = 78,722.08/x
3. Step 3: Cross multiply
   142,384.32x = 196,490.40 × 78,722.08
4. Step 4: Simplify right side
   142,384.32x = 15,468,132,988.03
5. Step 5: Solve for x
   x = 15,468,132,988.03/142,384.32
6. Step 6: Final answer
   x = 108,636.49