Finding the Fourth Proportional to 1,877.72, 2,815.88 and 836.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,877.72 : 2,815.88 = 836.71 : x
2. Step 2: Convert to fraction form
   1,877.72/2,815.88 = 836.71/x
3. Step 3: Cross multiply
   1,877.72x = 2,815.88 × 836.71
4. Step 4: Simplify right side
   1,877.72x = 2,356,056.69
5. Step 5: Solve for x
   x = 2,356,056.69/1,877.72
6. Step 6: Final answer
   x = 1,254.74