Finding the Fourth Proportional to 1,781.16, 2,455.53 and 1,535.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,781.16 : 2,455.53 = 1,535.10 : x
2. Step 2: Convert to fraction form
   1,781.16/2,455.53 = 1,535.10/x
3. Step 3: Cross multiply
   1,781.16x = 2,455.53 × 1,535.10
4. Step 4: Simplify right side
   1,781.16x = 3,769,484.10
5. Step 5: Solve for x
   x = 3,769,484.10/1,781.16
6. Step 6: Final answer
   x = 2,116.31