Finding the Fourth Proportional to 1,376.17, 2,062.36 and 912.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,376.17 : 2,062.36 = 912.72 : x
2. Step 2: Convert to fraction form
   1,376.17/2,062.36 = 912.72/x
3. Step 3: Cross multiply
   1,376.17x = 2,062.36 × 912.72
4. Step 4: Simplify right side
   1,376.17x = 1,882,357.22
5. Step 5: Solve for x
   x = 1,882,357.22/1,376.17
6. Step 6: Final answer
   x = 1,367.82