Finding the Fourth Proportional to 1,407.02, 1,941.69 and 817.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407.02 : 1,941.69 = 817.55 : x
2. Step 2: Convert to fraction form
   1,407.02/1,941.69 = 817.55/x
3. Step 3: Cross multiply
   1,407.02x = 1,941.69 × 817.55
4. Step 4: Simplify right side
   1,407.02x = 1,587,428.66
5. Step 5: Solve for x
   x = 1,587,428.66/1,407.02
6. Step 6: Final answer
   x = 1,128.22