Finding the Fourth Proportional to 142,123.61, 213,165.98 and 42,299.21

Step by Step Solution

1. Step 1: Write the proportion equation
   142,123.61 : 213,165.98 = 42,299.21 : x
2. Step 2: Convert to fraction form
   142,123.61/213,165.98 = 42,299.21/x
3. Step 3: Cross multiply
   142,123.61x = 213,165.98 × 42,299.21
4. Step 4: Simplify right side
   142,123.61x = 9,016,752,341.38
5. Step 5: Solve for x
   x = 9,016,752,341.38/142,123.61
6. Step 6: Final answer
   x = 63,443.03