Finding the Fourth Proportional to 2,188.31, 3,279.36 and 1,570.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,188.31 : 3,279.36 = 1,570.64 : x
2. Step 2: Convert to fraction form
   2,188.31/3,279.36 = 1,570.64/x
3. Step 3: Cross multiply
   2,188.31x = 3,279.36 × 1,570.64
4. Step 4: Simplify right side
   2,188.31x = 5,150,677.59
5. Step 5: Solve for x
   x = 5,150,677.59/2,188.31
6. Step 6: Final answer
   x = 2,353.73