Finding the Fourth Proportional to 2,507.65, 3,460.51 and 1,388.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,507.65 : 3,460.51 = 1,388.59 : x
2. Step 2: Convert to fraction form
   2,507.65/3,460.51 = 1,388.59/x
3. Step 3: Cross multiply
   2,507.65x = 3,460.51 × 1,388.59
4. Step 4: Simplify right side
   2,507.65x = 4,805,222.67
5. Step 5: Solve for x
   x = 4,805,222.67/2,507.65
6. Step 6: Final answer
   x = 1,916.22