Finding the Fourth Proportional to 123,247.66, 170,082.72 and 72,261.70

Step by Step Solution

1. Step 1: Write the proportion equation
   123,247.66 : 170,082.72 = 72,261.70 : x
2. Step 2: Convert to fraction form
   123,247.66/170,082.72 = 72,261.70/x
3. Step 3: Cross multiply
   123,247.66x = 170,082.72 × 72,261.70
4. Step 4: Simplify right side
   123,247.66x = 12,290,466,487.82
5. Step 5: Solve for x
   x = 12,290,466,487.82/123,247.66
6. Step 6: Final answer
   x = 99,721.70