Finding the Fourth Proportional to 72,434.89, 108,683.55 and 39,178.37

Step by Step Solution

1. Step 1: Write the proportion equation
   72,434.89 : 108,683.55 = 39,178.37 : x
2. Step 2: Convert to fraction form
   72,434.89/108,683.55 = 39,178.37/x
3. Step 3: Cross multiply
   72,434.89x = 108,683.55 × 39,178.37
4. Step 4: Simplify right side
   72,434.89x = 4,258,044,334.81
5. Step 5: Solve for x
   x = 4,258,044,334.81/72,434.89
6. Step 6: Final answer
   x = 58,784.44