Finding the Fourth Proportional to 215,142.12, 296,690.04 and 142,429.86

Step by Step Solution

1. Step 1: Write the proportion equation
   215,142.12 : 296,690.04 = 142,429.86 : x
2. Step 2: Convert to fraction form
   215,142.12/296,690.04 = 142,429.86/x
3. Step 3: Cross multiply
   215,142.12x = 296,690.04 × 142,429.86
4. Step 4: Simplify right side
   215,142.12x = 42,257,520,860.59
5. Step 5: Solve for x
   x = 42,257,520,860.59/215,142.12
6. Step 6: Final answer
   x = 196,416.77