Finding the Fourth Proportional to 78,350.57, 117,572.55 and 28,434.56

Step by Step Solution

1. Step 1: Write the proportion equation
   78,350.57 : 117,572.55 = 28,434.56 : x
2. Step 2: Convert to fraction form
   78,350.57/117,572.55 = 28,434.56/x
3. Step 3: Cross multiply
   78,350.57x = 117,572.55 × 28,434.56
4. Step 4: Simplify right side
   78,350.57x = 3,343,123,585.16
5. Step 5: Solve for x
   x = 3,343,123,585.16/78,350.57
6. Step 6: Final answer
   x = 42,668.79