Finding the Fourth Proportional to 1,781.12, 2,457.72 and 995.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,781.12 : 2,457.72 = 995.15 : x
2. Step 2: Convert to fraction form
   1,781.12/2,457.72 = 995.15/x
3. Step 3: Cross multiply
   1,781.12x = 2,457.72 × 995.15
4. Step 4: Simplify right side
   1,781.12x = 2,445,787.77
5. Step 5: Solve for x
   x = 2,445,787.77/1,781.12
6. Step 6: Final answer
   x = 1,373.18