Finding the Fourth Proportional to 78,256.48, 107,993.15 and 42,445.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,256.48 : 107,993.15 = 42,445.72 : x
2. Step 2: Convert to fraction form
   78,256.48/107,993.15 = 42,445.72/x
3. Step 3: Cross multiply
   78,256.48x = 107,993.15 × 42,445.72
4. Step 4: Simplify right side
   78,256.48x = 4,583,847,088.75
5. Step 5: Solve for x
   x = 4,583,847,088.75/78,256.48
6. Step 6: Final answer
   x = 58,574.67