Finding the Fourth Proportional to 78,447.30, 108,257.94 and 42,637.32

Step by Step Solution

1. Step 1: Write the proportion equation
   78,447.30 : 108,257.94 = 42,637.32 : x
2. Step 2: Convert to fraction form
   78,447.30/108,257.94 = 42,637.32/x
3. Step 3: Cross multiply
   78,447.30x = 108,257.94 × 42,637.32
4. Step 4: Simplify right side
   78,447.30x = 4,615,828,430.32
5. Step 5: Solve for x
   x = 4,615,828,430.32/78,447.30
6. Step 6: Final answer
   x = 58,839.86