Finding the Fourth Proportional to 1,407.79, 2,111.58 and 483.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407.79 : 2,111.58 = 483.31 : x
2. Step 2: Convert to fraction form
   1,407.79/2,111.58 = 483.31/x
3. Step 3: Cross multiply
   1,407.79x = 2,111.58 × 483.31
4. Step 4: Simplify right side
   1,407.79x = 1,020,547.73
5. Step 5: Solve for x
   x = 1,020,547.73/1,407.79
6. Step 6: Final answer
   x = 724.93