Finding the Fourth Proportional to 7,128.59, 10,691.67 and 1,933.25

Step by Step Solution

1. Step 1: Write the proportion equation
   7,128.59 : 10,691.67 = 1,933.25 : x
2. Step 2: Convert to fraction form
   7,128.59/10,691.67 = 1,933.25/x
3. Step 3: Cross multiply
   7,128.59x = 10,691.67 × 1,933.25
4. Step 4: Simplify right side
   7,128.59x = 20,669,671.03
5. Step 5: Solve for x
   x = 20,669,671.03/7,128.59
6. Step 6: Final answer
   x = 2,899.55