Finding the Fourth Proportional to 2,507.63, 3,460.47 and 1,388.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,507.63 : 3,460.47 = 1,388.50 : x
2. Step 2: Convert to fraction form
   2,507.63/3,460.47 = 1,388.50/x
3. Step 3: Cross multiply
   2,507.63x = 3,460.47 × 1,388.50
4. Step 4: Simplify right side
   2,507.63x = 4,804,862.60
5. Step 5: Solve for x
   x = 4,804,862.60/2,507.63
6. Step 6: Final answer
   x = 1,916.10