Finding the Fourth Proportional to 1,820.86, 2,731.89 and 724.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,820.86 : 2,731.89 = 724.93 : x
2. Step 2: Convert to fraction form
   1,820.86/2,731.89 = 724.93/x
3. Step 3: Cross multiply
   1,820.86x = 2,731.89 × 724.93
4. Step 4: Simplify right side
   1,820.86x = 1,980,429.02
5. Step 5: Solve for x
   x = 1,980,429.02/1,820.86
6. Step 6: Final answer
   x = 1,087.63