Finding the Fourth Proportional to 78,302.48, 108,055.56 and 42,490.96

Step by Step Solution

1. Step 1: Write the proportion equation
   78,302.48 : 108,055.56 = 42,490.96 : x
2. Step 2: Convert to fraction form
   78,302.48/108,055.56 = 42,490.96/x
3. Step 3: Cross multiply
   78,302.48x = 108,055.56 × 42,490.96
4. Step 4: Simplify right side
   78,302.48x = 4,591,384,477.74
5. Step 5: Solve for x
   x = 4,591,384,477.74/78,302.48
6. Step 6: Final answer
   x = 58,636.51