Finding the Fourth Proportional to 78,048.20, 107,706.54 and 42,238.24

Step by Step Solution

1. Step 1: Write the proportion equation
   78,048.20 : 107,706.54 = 42,238.24 : x
2. Step 2: Convert to fraction form
   78,048.20/107,706.54 = 42,238.24/x
3. Step 3: Cross multiply
   78,048.20x = 107,706.54 × 42,238.24
4. Step 4: Simplify right side
   78,048.20x = 4,549,334,686.09
5. Step 5: Solve for x
   x = 4,549,334,686.09/78,048.20
6. Step 6: Final answer
   x = 58,288.78