Finding the Fourth Proportional to 78,127.52, 107,815.78 and 42,317.62

Step by Step Solution

1. Step 1: Write the proportion equation
   78,127.52 : 107,815.78 = 42,317.62 : x
2. Step 2: Convert to fraction form
   78,127.52/107,815.78 = 42,317.62/x
3. Step 3: Cross multiply
   78,127.52x = 107,815.78 × 42,317.62
4. Step 4: Simplify right side
   78,127.52x = 4,562,507,208.04
5. Step 5: Solve for x
   x = 4,562,507,208.04/78,127.52
6. Step 6: Final answer
   x = 58,398.21