Finding the Fourth Proportional to 1,407.33, 2,111.42 and 433.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407.33 : 2,111.42 = 433.58 : x
2. Step 2: Convert to fraction form
   1,407.33/2,111.42 = 433.58/x
3. Step 3: Cross multiply
   1,407.33x = 2,111.42 × 433.58
4. Step 4: Simplify right side
   1,407.33x = 915,456.76
5. Step 5: Solve for x
   x = 915,456.76/1,407.33
6. Step 6: Final answer
   x = 650.49