Finding the Fourth Proportional to 1,499.12, 2,068.79 and 870.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,499.12 : 2,068.79 = 870.02 : x
2. Step 2: Convert to fraction form
   1,499.12/2,068.79 = 870.02/x
3. Step 3: Cross multiply
   1,499.12x = 2,068.79 × 870.02
4. Step 4: Simplify right side
   1,499.12x = 1,799,892.45
5. Step 5: Solve for x
   x = 1,799,892.45/1,499.12
6. Step 6: Final answer
   x = 1,200.63