Finding the Fourth Proportional to 123,461.78, 170,377.19 and 72,474.51

Step by Step Solution

1. Step 1: Write the proportion equation
   123,461.78 : 170,377.19 = 72,474.51 : x
2. Step 2: Convert to fraction form
   123,461.78/170,377.19 = 72,474.51/x
3. Step 3: Cross multiply
   123,461.78x = 170,377.19 × 72,474.51
4. Step 4: Simplify right side
   123,461.78x = 12,348,003,541.61
5. Step 5: Solve for x
   x = 12,348,003,541.61/123,461.78
6. Step 6: Final answer
   x = 100,014.78