Finding the Fourth Proportional to 1,820.68, 2,506.74 and 1,587.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,820.68 : 2,506.74 = 1,587.72 : x
2. Step 2: Convert to fraction form
   1,820.68/2,506.74 = 1,587.72/x
3. Step 3: Cross multiply
   1,820.68x = 2,506.74 × 1,587.72
4. Step 4: Simplify right side
   1,820.68x = 3,980,001.23
5. Step 5: Solve for x
   x = 3,980,001.23/1,820.68
6. Step 6: Final answer
   x = 2,186.00