Finding the Fourth Proportional to 142,124.61, 213,167.48 and 42,300.21

Step by Step Solution

1. Step 1: Write the proportion equation
   142,124.61 : 213,167.48 = 42,300.21 : x
2. Step 2: Convert to fraction form
   142,124.61/213,167.48 = 42,300.21/x
3. Step 3: Cross multiply
   142,124.61x = 213,167.48 × 42,300.21
4. Step 4: Simplify right side
   142,124.61x = 9,017,028,957.67
5. Step 5: Solve for x
   x = 9,017,028,957.67/142,124.61
6. Step 6: Final answer
   x = 63,444.53