Finding the Fourth Proportional to 1,667.78, 2,497.29 and 1,407.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.78 : 2,497.29 = 1,407.13 : x
2. Step 2: Convert to fraction form
   1,667.78/2,497.29 = 1,407.13/x
3. Step 3: Cross multiply
   1,667.78x = 2,497.29 × 1,407.13
4. Step 4: Simplify right side
   1,667.78x = 3,514,005.43
5. Step 5: Solve for x
   x = 3,514,005.43/1,667.78
6. Step 6: Final answer
   x = 2,106.99