Finding the Fourth Proportional to 2,621.30, 3,930.90 and 1,061.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.30 : 3,930.90 = 1,061.01 : x
2. Step 2: Convert to fraction form
   2,621.30/3,930.90 = 1,061.01/x
3. Step 3: Cross multiply
   2,621.30x = 3,930.90 × 1,061.01
4. Step 4: Simplify right side
   2,621.30x = 4,170,724.21
5. Step 5: Solve for x
   x = 4,170,724.21/2,621.30
6. Step 6: Final answer
   x = 1,591.09