Finding the Fourth Proportional to 1,407.52, 1,942.32 and 818.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407.52 : 1,942.32 = 818.08 : x
2. Step 2: Convert to fraction form
   1,407.52/1,942.32 = 818.08/x
3. Step 3: Cross multiply
   1,407.52x = 1,942.32 × 818.08
4. Step 4: Simplify right side
   1,407.52x = 1,588,973.15
5. Step 5: Solve for x
   x = 1,588,973.15/1,407.52
6. Step 6: Final answer
   x = 1,128.92