Finding the Fourth Proportional to 2,505.02, 3,457.13 and 1,386.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,505.02 : 3,457.13 = 1,386.09 : x
2. Step 2: Convert to fraction form
   2,505.02/3,457.13 = 1,386.09/x
3. Step 3: Cross multiply
   2,505.02x = 3,457.13 × 1,386.09
4. Step 4: Simplify right side
   2,505.02x = 4,791,886.39
5. Step 5: Solve for x
   x = 4,791,886.39/2,505.02
6. Step 6: Final answer
   x = 1,912.92