Finding the Fourth Proportional to 1,499.58, 2,069.28 and 910.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,499.58 : 2,069.28 = 910.31 : x
2. Step 2: Convert to fraction form
   1,499.58/2,069.28 = 910.31/x
3. Step 3: Cross multiply
   1,499.58x = 2,069.28 × 910.31
4. Step 4: Simplify right side
   1,499.58x = 1,883,675.93
5. Step 5: Solve for x
   x = 1,883,675.93/1,499.58
6. Step 6: Final answer
   x = 1,256.14