Finding the Fourth Proportional to 78,447.55, 108,258.72 and 42,637.55

Step by Step Solution

1. Step 1: Write the proportion equation
   78,447.55 : 108,258.72 = 42,637.55 : x
2. Step 2: Convert to fraction form
   78,447.55/108,258.72 = 42,637.55/x
3. Step 3: Cross multiply
   78,447.55x = 108,258.72 × 42,637.55
4. Step 4: Simplify right side
   78,447.55x = 4,615,886,373.75
5. Step 5: Solve for x
   x = 4,615,886,373.75/78,447.55
6. Step 6: Final answer
   x = 58,840.41