Finding the Fourth Proportional to 72,085.95, 108,128.88 and 52,489.17

Step by Step Solution

1. Step 1: Write the proportion equation
   72,085.95 : 108,128.88 = 52,489.17 : x
2. Step 2: Convert to fraction form
   72,085.95/108,128.88 = 52,489.17/x
3. Step 3: Cross multiply
   72,085.95x = 108,128.88 × 52,489.17
4. Step 4: Simplify right side
   72,085.95x = 5,675,595,164.23
5. Step 5: Solve for x
   x = 5,675,595,164.23/72,085.95
6. Step 6: Final answer
   x = 78,733.72