Finding the Fourth Proportional to 2,505.61, 3,457.82 and 1,386.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,505.61 : 3,457.82 = 1,386.59 : x
2. Step 2: Convert to fraction form
   2,505.61/3,457.82 = 1,386.59/x
3. Step 3: Cross multiply
   2,505.61x = 3,457.82 × 1,386.59
4. Step 4: Simplify right side
   2,505.61x = 4,794,564.81
5. Step 5: Solve for x
   x = 4,794,564.81/2,505.61
6. Step 6: Final answer
   x = 1,913.53