Finding the Fourth Proportional to 1,499.90, 2,070.04 and 910.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,499.90 : 2,070.04 = 910.60 : x
2. Step 2: Convert to fraction form
   1,499.90/2,070.04 = 910.60/x
3. Step 3: Cross multiply
   1,499.90x = 2,070.04 × 910.60
4. Step 4: Simplify right side
   1,499.90x = 1,884,978.42
5. Step 5: Solve for x
   x = 1,884,978.42/1,499.90
6. Step 6: Final answer
   x = 1,256.74