Finding the Fourth Proportional to 1,407.38, 2,111.29 and 1,146.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407.38 : 2,111.29 = 1,146.76 : x
2. Step 2: Convert to fraction form
   1,407.38/2,111.29 = 1,146.76/x
3. Step 3: Cross multiply
   1,407.38x = 2,111.29 × 1,146.76
4. Step 4: Simplify right side
   1,407.38x = 2,421,134.78
5. Step 5: Solve for x
   x = 2,421,134.78/1,407.38
6. Step 6: Final answer
   x = 1,720.32