Finding the Fourth Proportional to 1,591.37, 2,196.01 and 928.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,591.37 : 2,196.01 = 928.12 : x
2. Step 2: Convert to fraction form
   1,591.37/2,196.01 = 928.12/x
3. Step 3: Cross multiply
   1,591.37x = 2,196.01 × 928.12
4. Step 4: Simplify right side
   1,591.37x = 2,038,152.99
5. Step 5: Solve for x
   x = 2,038,152.99/1,591.37
6. Step 6: Final answer
   x = 1,280.75