Finding the Fourth Proportional to 2,507.80, 3,460.96 and 1,388.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,507.80 : 3,460.96 = 1,388.84 : x
2. Step 2: Convert to fraction form
   2,507.80/3,460.96 = 1,388.84/x
3. Step 3: Cross multiply
   2,507.80x = 3,460.96 × 1,388.84
4. Step 4: Simplify right side
   2,507.80x = 4,806,713.83
5. Step 5: Solve for x
   x = 4,806,713.83/2,507.80
6. Step 6: Final answer
   x = 1,916.71