Finding the Fourth Proportional to 1,499.83, 2,070.22 and 870.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,499.83 : 2,070.22 = 870.64 : x
2. Step 2: Convert to fraction form
   1,499.83/2,070.22 = 870.64/x
3. Step 3: Cross multiply
   1,499.83x = 2,070.22 × 870.64
4. Step 4: Simplify right side
   1,499.83x = 1,802,422.27
5. Step 5: Solve for x
   x = 1,802,422.27/1,499.83
6. Step 6: Final answer
   x = 1,201.75