Finding the Fourth Proportional to 78,048.98, 107,707.59 and 42,238.99

Step by Step Solution

1. Step 1: Write the proportion equation
   78,048.98 : 107,707.59 = 42,238.99 : x
2. Step 2: Convert to fraction form
   78,048.98/107,707.59 = 42,238.99/x
3. Step 3: Cross multiply
   78,048.98x = 107,707.59 × 42,238.99
4. Step 4: Simplify right side
   78,048.98x = 4,549,460,116.40
5. Step 5: Solve for x
   x = 4,549,460,116.40/78,048.98
6. Step 6: Final answer
   x = 58,289.81