Finding the Fourth Proportional to 2,507.60, 3,460.52 and 1,388.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,507.60 : 3,460.52 = 1,388.52 : x
2. Step 2: Convert to fraction form
   2,507.60/3,460.52 = 1,388.52/x
3. Step 3: Cross multiply
   2,507.60x = 3,460.52 × 1,388.52
4. Step 4: Simplify right side
   2,507.60x = 4,805,001.23
5. Step 5: Solve for x
   x = 4,805,001.23/2,507.60
6. Step 6: Final answer
   x = 1,916.18