Finding the Fourth Proportional to 1,880.00, 2,820.65 and 1,187.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,880.00 : 2,820.65 = 1,187.15 : x
2. Step 2: Convert to fraction form
   1,880.00/2,820.65 = 1,187.15/x
3. Step 3: Cross multiply
   1,880.00x = 2,820.65 × 1,187.15
4. Step 4: Simplify right side
   1,880.00x = 3,348,514.61
5. Step 5: Solve for x
   x = 3,348,514.61/1,880.00
6. Step 6: Final answer
   x = 1,781.13