Finding the Fourth Proportional to 2,507.08, 3,459.72 and 1,387.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,507.08 : 3,459.72 = 1,387.96 : x
2. Step 2: Convert to fraction form
   2,507.08/3,459.72 = 1,387.96/x
3. Step 3: Cross multiply
   2,507.08x = 3,459.72 × 1,387.96
4. Step 4: Simplify right side
   2,507.08x = 4,801,935.67
5. Step 5: Solve for x
   x = 4,801,935.67/2,507.08
6. Step 6: Final answer
   x = 1,915.35