Finding the Fourth Proportional to 1,477.90, 2,039.63 and 814.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,477.90 : 2,039.63 = 814.81 : x
2. Step 2: Convert to fraction form
   1,477.90/2,039.63 = 814.81/x
3. Step 3: Cross multiply
   1,477.90x = 2,039.63 × 814.81
4. Step 4: Simplify right side
   1,477.90x = 1,661,910.15
5. Step 5: Solve for x
   x = 1,661,910.15/1,477.90
6. Step 6: Final answer
   x = 1,124.51