Finding the Fourth Proportional to 1,499.92, 2,070.03 and 910.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,499.92 : 2,070.03 = 910.78 : x
2. Step 2: Convert to fraction form
   1,499.92/2,070.03 = 910.78/x
3. Step 3: Cross multiply
   1,499.92x = 2,070.03 × 910.78
4. Step 4: Simplify right side
   1,499.92x = 1,885,341.92
5. Step 5: Solve for x
   x = 1,885,341.92/1,499.92
6. Step 6: Final answer
   x = 1,256.96