Finding the Fourth Proportional to 1,407.63, 1,941.75 and 818.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407.63 : 1,941.75 = 818.10 : x
2. Step 2: Convert to fraction form
   1,407.63/1,941.75 = 818.10/x
3. Step 3: Cross multiply
   1,407.63x = 1,941.75 × 818.10
4. Step 4: Simplify right side
   1,407.63x = 1,588,545.68
5. Step 5: Solve for x
   x = 1,588,545.68/1,407.63
6. Step 6: Final answer
   x = 1,128.53