Finding the Fourth Proportional to 78,447.05, 108,258.03 and 42,637.05

Step by Step Solution

1. Step 1: Write the proportion equation
   78,447.05 : 108,258.03 = 42,637.05 : x
2. Step 2: Convert to fraction form
   78,447.05/108,258.03 = 42,637.05/x
3. Step 3: Cross multiply
   78,447.05x = 108,258.03 × 42,637.05
4. Step 4: Simplify right side
   78,447.05x = 4,615,802,824.83
5. Step 5: Solve for x
   x = 4,615,802,824.83/78,447.05
6. Step 6: Final answer
   x = 58,839.72