Finding the Fourth Proportional to 1,378.17, 1,902.62 and 1,062.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,378.17 : 1,902.62 = 1,062.75 : x
2. Step 2: Convert to fraction form
   1,378.17/1,902.62 = 1,062.75/x
3. Step 3: Cross multiply
   1,378.17x = 1,902.62 × 1,062.75
4. Step 4: Simplify right side
   1,378.17x = 2,022,004.09
5. Step 5: Solve for x
   x = 2,022,004.09/1,378.17
6. Step 6: Final answer
   x = 1,467.17