Finding the Fourth Proportional to 1,387.74, 1,916.73 and 1,014.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,387.74 : 1,916.73 = 1,014.12 : x
2. Step 2: Convert to fraction form
   1,387.74/1,916.73 = 1,014.12/x
3. Step 3: Cross multiply
   1,387.74x = 1,916.73 × 1,014.12
4. Step 4: Simplify right side
   1,387.74x = 1,943,794.23
5. Step 5: Solve for x
   x = 1,943,794.23/1,387.74
6. Step 6: Final answer
   x = 1,400.69