Finding the Fourth Proportional to 142,686.12, 214,061.98 and 42,848.20

Step by Step Solution

1. Step 1: Write the proportion equation
   142,686.12 : 214,061.98 = 42,848.20 : x
2. Step 2: Convert to fraction form
   142,686.12/214,061.98 = 42,848.20/x
3. Step 3: Cross multiply
   142,686.12x = 214,061.98 × 42,848.20
4. Step 4: Simplify right side
   142,686.12x = 9,172,169,889.16
5. Step 5: Solve for x
   x = 9,172,169,889.16/142,686.12
6. Step 6: Final answer
   x = 64,282.15