Finding the Fourth Proportional to 142,535.27, 196,702.76 and 78,878.99

Step by Step Solution

1. Step 1: Write the proportion equation
   142,535.27 : 196,702.76 = 78,878.99 : x
2. Step 2: Convert to fraction form
   142,535.27/196,702.76 = 78,878.99/x
3. Step 3: Cross multiply
   142,535.27x = 196,702.76 × 78,878.99
4. Step 4: Simplify right side
   142,535.27x = 15,515,714,644.62
5. Step 5: Solve for x
   x = 15,515,714,644.62/142,535.27
6. Step 6: Final answer
   x = 108,855.27