Finding the Fourth Proportional to 2,620.59, 3,928.40 and 976.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620.59 : 3,928.40 = 976.01 : x
2. Step 2: Convert to fraction form
   2,620.59/3,928.40 = 976.01/x
3. Step 3: Cross multiply
   2,620.59x = 3,928.40 × 976.01
4. Step 4: Simplify right side
   2,620.59x = 3,834,152.80
5. Step 5: Solve for x
   x = 3,834,152.80/2,620.59
6. Step 6: Final answer
   x = 1,463.09