Finding the Fourth Proportional to 1,500.07, 2,070.56 and 870.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,500.07 : 2,070.56 = 870.75 : x
2. Step 2: Convert to fraction form
   1,500.07/2,070.56 = 870.75/x
3. Step 3: Cross multiply
   1,500.07x = 2,070.56 × 870.75
4. Step 4: Simplify right side
   1,500.07x = 1,802,940.12
5. Step 5: Solve for x
   x = 1,802,940.12/1,500.07
6. Step 6: Final answer
   x = 1,201.90