Finding the Fourth Proportional to 2,507.97, 3,460.87 and 1,388.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,507.97 : 3,460.87 = 1,388.89 : x
2. Step 2: Convert to fraction form
   2,507.97/3,460.87 = 1,388.89/x
3. Step 3: Cross multiply
   2,507.97x = 3,460.87 × 1,388.89
4. Step 4: Simplify right side
   2,507.97x = 4,806,755.61
5. Step 5: Solve for x
   x = 4,806,755.61/2,507.97
6. Step 6: Final answer
   x = 1,916.59