Finding the Fourth Proportional to 73,972.24, 102,082.78 and 42,140.45

Step by Step Solution

1. Step 1: Write the proportion equation
   73,972.24 : 102,082.78 = 42,140.45 : x
2. Step 2: Convert to fraction form
   73,972.24/102,082.78 = 42,140.45/x
3. Step 3: Cross multiply
   73,972.24x = 102,082.78 × 42,140.45
4. Step 4: Simplify right side
   73,972.24x = 4,301,814,594.33
5. Step 5: Solve for x
   x = 4,301,814,594.33/73,972.24
6. Step 6: Final answer
   x = 58,154.45