Finding the Fourth Proportional to 2,130.50, 3,188.52 and 1,308.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,130.50 : 3,188.52 = 1,308.35 : x
2. Step 2: Convert to fraction form
   2,130.50/3,188.52 = 1,308.35/x
3. Step 3: Cross multiply
   2,130.50x = 3,188.52 × 1,308.35
4. Step 4: Simplify right side
   2,130.50x = 4,171,700.14
5. Step 5: Solve for x
   x = 4,171,700.14/2,130.50
6. Step 6: Final answer
   x = 1,958.09