Finding the Fourth Proportional to 142,061.86, 213,217.38 and 57,821.76

Step by Step Solution

1. Step 1: Write the proportion equation
   142,061.86 : 213,217.38 = 57,821.76 : x
2. Step 2: Convert to fraction form
   142,061.86/213,217.38 = 57,821.76/x
3. Step 3: Cross multiply
   142,061.86x = 213,217.38 × 57,821.76
4. Step 4: Simplify right side
   142,061.86x = 12,328,604,174.19
5. Step 5: Solve for x
   x = 12,328,604,174.19/142,061.86
6. Step 6: Final answer
   x = 86,783.35