Finding the Fourth Proportional to 72,434.64, 108,683.18 and 39,178.12

Step by Step Solution

1. Step 1: Write the proportion equation
   72,434.64 : 108,683.18 = 39,178.12 : x
2. Step 2: Convert to fraction form
   72,434.64/108,683.18 = 39,178.12/x
3. Step 3: Cross multiply
   72,434.64x = 108,683.18 × 39,178.12
4. Step 4: Simplify right side
   72,434.64x = 4,258,002,668.02
5. Step 5: Solve for x
   x = 4,258,002,668.02/72,434.64
6. Step 6: Final answer
   x = 58,784.07