Finding the Fourth Proportional to 2,507.59, 3,460.35 and 1,388.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,507.59 : 3,460.35 = 1,388.56 : x
2. Step 2: Convert to fraction form
   2,507.59/3,460.35 = 1,388.56/x
3. Step 3: Cross multiply
   2,507.59x = 3,460.35 × 1,388.56
4. Step 4: Simplify right side
   2,507.59x = 4,804,903.60
5. Step 5: Solve for x
   x = 4,804,903.60/2,507.59
6. Step 6: Final answer
   x = 1,916.14