Finding the Fourth Proportional to 1,935.60, 2,671.89 and 1,306.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,935.60 : 2,671.89 = 1,306.50 : x
2. Step 2: Convert to fraction form
   1,935.60/2,671.89 = 1,306.50/x
3. Step 3: Cross multiply
   1,935.60x = 2,671.89 × 1,306.50
4. Step 4: Simplify right side
   1,935.60x = 3,490,824.29
5. Step 5: Solve for x
   x = 3,490,824.29/1,935.60
6. Step 6: Final answer
   x = 1,803.48