Finding the Fourth Proportional to 1,965.34, 2,947.60 and 1,088.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,965.34 : 2,947.60 = 1,088.70 : x
2. Step 2: Convert to fraction form
   1,965.34/2,947.60 = 1,088.70/x
3. Step 3: Cross multiply
   1,965.34x = 2,947.60 × 1,088.70
4. Step 4: Simplify right side
   1,965.34x = 3,209,052.12
5. Step 5: Solve for x
   x = 3,209,052.12/1,965.34
6. Step 6: Final answer
   x = 1,632.82