Finding the Fourth Proportional to 72,611.78, 108,820.76 and 38,808.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,611.78 : 108,820.76 = 38,808.50 : x
2. Step 2: Convert to fraction form
   72,611.78/108,820.76 = 38,808.50/x
3. Step 3: Cross multiply
   72,611.78x = 108,820.76 × 38,808.50
4. Step 4: Simplify right side
   72,611.78x = 4,223,170,464.46
5. Step 5: Solve for x
   x = 4,223,170,464.46/72,611.78
6. Step 6: Final answer
   x = 58,160.95