Finding the Fourth Proportional to 2,505.63, 3,457.77 and 1,386.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,505.63 : 3,457.77 = 1,386.61 : x
2. Step 2: Convert to fraction form
   2,505.63/3,457.77 = 1,386.61/x
3. Step 3: Cross multiply
   2,505.63x = 3,457.77 × 1,386.61
4. Step 4: Simplify right side
   2,505.63x = 4,794,587.10
5. Step 5: Solve for x
   x = 4,794,587.10/2,505.63
6. Step 6: Final answer
   x = 1,913.53