Finding the Fourth Proportional to 72,071.55, 108,173.76 and 36,557.79

Step by Step Solution

1. Step 1: Write the proportion equation
   72,071.55 : 108,173.76 = 36,557.79 : x
2. Step 2: Convert to fraction form
   72,071.55/108,173.76 = 36,557.79/x
3. Step 3: Cross multiply
   72,071.55x = 108,173.76 × 36,557.79
4. Step 4: Simplify right side
   72,071.55x = 3,954,593,601.59
5. Step 5: Solve for x
   x = 3,954,593,601.59/72,071.55
6. Step 6: Final answer
   x = 54,870.38