Finding the Fourth Proportional to 123,279.90, 170,123.67 and 72,995.10

Step by Step Solution

1. Step 1: Write the proportion equation
   123,279.90 : 170,123.67 = 72,995.10 : x
2. Step 2: Convert to fraction form
   123,279.90/170,123.67 = 72,995.10/x
3. Step 3: Cross multiply
   123,279.90x = 170,123.67 × 72,995.10
4. Step 4: Simplify right side
   123,279.90x = 12,418,194,304.02
5. Step 5: Solve for x
   x = 12,418,194,304.02/123,279.90
6. Step 6: Final answer
   x = 100,731.70