Finding the Fourth Proportional to 5,264.52, 7,900.86 and 1,980.60

Step by Step Solution

1. Step 1: Write the proportion equation
   5,264.52 : 7,900.86 = 1,980.60 : x
2. Step 2: Convert to fraction form
   5,264.52/7,900.86 = 1,980.60/x
3. Step 3: Cross multiply
   5,264.52x = 7,900.86 × 1,980.60
4. Step 4: Simplify right side
   5,264.52x = 15,648,443.32
5. Step 5: Solve for x
   x = 15,648,443.32/5,264.52
6. Step 6: Final answer
   x = 2,972.43