Finding the Fourth Proportional to 78,447.31, 108,258.13 and 42,637.33

Step by Step Solution

1. Step 1: Write the proportion equation
   78,447.31 : 108,258.13 = 42,637.33 : x
2. Step 2: Convert to fraction form
   78,447.31/108,258.13 = 42,637.33/x
3. Step 3: Cross multiply
   78,447.31x = 108,258.13 × 42,637.33
4. Step 4: Simplify right side
   78,447.31x = 4,615,837,613.99
5. Step 5: Solve for x
   x = 4,615,837,613.99/78,447.31
6. Step 6: Final answer
   x = 58,839.97