Finding the Fourth Proportional to 86,120.38, 129,102.72 and 30,703.42

Step by Step Solution

1. Step 1: Write the proportion equation
   86,120.38 : 129,102.72 = 30,703.42 : x
2. Step 2: Convert to fraction form
   86,120.38/129,102.72 = 30,703.42/x
3. Step 3: Cross multiply
   86,120.38x = 129,102.72 × 30,703.42
4. Step 4: Simplify right side
   86,120.38x = 3,963,895,035.30
5. Step 5: Solve for x
   x = 3,963,895,035.30/86,120.38
6. Step 6: Final answer
   x = 46,027.38