Finding the Fourth Proportional to 123,274.91, 170,065.17 and 72,261.72

Step by Step Solution

1. Step 1: Write the proportion equation
   123,274.91 : 170,065.17 = 72,261.72 : x
2. Step 2: Convert to fraction form
   123,274.91/170,065.17 = 72,261.72/x
3. Step 3: Cross multiply
   123,274.91x = 170,065.17 × 72,261.72
4. Step 4: Simplify right side
   123,274.91x = 12,289,201,696.29
5. Step 5: Solve for x
   x = 12,289,201,696.29/123,274.91
6. Step 6: Final answer
   x = 99,689.40