Finding the Fourth Proportional to 142,330.55, 213,488.54 and 42,491.57

Step by Step Solution

1. Step 1: Write the proportion equation
   142,330.55 : 213,488.54 = 42,491.57 : x
2. Step 2: Convert to fraction form
   142,330.55/213,488.54 = 42,491.57/x
3. Step 3: Cross multiply
   142,330.55x = 213,488.54 × 42,491.57
4. Step 4: Simplify right side
   142,330.55x = 9,071,463,241.61
5. Step 5: Solve for x
   x = 9,071,463,241.61/142,330.55
6. Step 6: Final answer
   x = 63,735.18