Finding the Fourth Proportional to 142,362.63, 196,443.37 and 78,691.77

Step by Step Solution

1. Step 1: Write the proportion equation
   142,362.63 : 196,443.37 = 78,691.77 : x
2. Step 2: Convert to fraction form
   142,362.63/196,443.37 = 78,691.77/x
3. Step 3: Cross multiply
   142,362.63x = 196,443.37 × 78,691.77
4. Step 4: Simplify right side
   142,362.63x = 15,458,476,490.06
5. Step 5: Solve for x
   x = 15,458,476,490.06/142,362.63
6. Step 6: Final answer
   x = 108,585.21