Finding the Fourth Proportional to 142,659.28, 214,024.52 and 42,821.32

Step by Step Solution

1. Step 1: Write the proportion equation
   142,659.28 : 214,024.52 = 42,821.32 : x
2. Step 2: Convert to fraction form
   142,659.28/214,024.52 = 42,821.32/x
3. Step 3: Cross multiply
   142,659.28x = 214,024.52 × 42,821.32
4. Step 4: Simplify right side
   142,659.28x = 9,164,812,458.77
5. Step 5: Solve for x
   x = 9,164,812,458.77/142,659.28
6. Step 6: Final answer
   x = 64,242.67