Finding the Fourth Proportional to 1,407.83, 1,942.50 and 810.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407.83 : 1,942.50 = 810.39 : x
2. Step 2: Convert to fraction form
   1,407.83/1,942.50 = 810.39/x
3. Step 3: Cross multiply
   1,407.83x = 1,942.50 × 810.39
4. Step 4: Simplify right side
   1,407.83x = 1,574,182.58
5. Step 5: Solve for x
   x = 1,574,182.58/1,407.83
6. Step 6: Final answer
   x = 1,118.17