Finding the Fourth Proportional to 142,300.08, 196,373.16 and 78,637.92

Step by Step Solution

1. Step 1: Write the proportion equation
   142,300.08 : 196,373.16 = 78,637.92 : x
2. Step 2: Convert to fraction form
   142,300.08/196,373.16 = 78,637.92/x
3. Step 3: Cross multiply
   142,300.08x = 196,373.16 × 78,637.92
4. Step 4: Simplify right side
   142,300.08x = 15,442,376,846.23
5. Step 5: Solve for x
   x = 15,442,376,846.23/142,300.08
6. Step 6: Final answer
   x = 108,519.80