Finding the Fourth Proportional to 1,877.72, 2,817.18 and 903.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,877.72 : 2,817.18 = 903.69 : x
2. Step 2: Convert to fraction form
   1,877.72/2,817.18 = 903.69/x
3. Step 3: Cross multiply
   1,877.72x = 2,817.18 × 903.69
4. Step 4: Simplify right side
   1,877.72x = 2,545,857.39
5. Step 5: Solve for x
   x = 2,545,857.39/1,877.72
6. Step 6: Final answer
   x = 1,355.83