Finding the Fourth Proportional to 1,499.77, 2,069.90 and 910.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,499.77 : 2,069.90 = 910.19 : x
2. Step 2: Convert to fraction form
   1,499.77/2,069.90 = 910.19/x
3. Step 3: Cross multiply
   1,499.77x = 2,069.90 × 910.19
4. Step 4: Simplify right side
   1,499.77x = 1,883,999.79
5. Step 5: Solve for x
   x = 1,883,999.79/1,499.77
6. Step 6: Final answer
   x = 1,256.20