Finding the Fourth Proportional to 6,910.52, 10,365.72 and 1,980.15

Step by Step Solution

1. Step 1: Write the proportion equation
   6,910.52 : 10,365.72 = 1,980.15 : x
2. Step 2: Convert to fraction form
   6,910.52/10,365.72 = 1,980.15/x
3. Step 3: Cross multiply
   6,910.52x = 10,365.72 × 1,980.15
4. Step 4: Simplify right side
   6,910.52x = 20,525,632.77
5. Step 5: Solve for x
   x = 20,525,632.77/6,910.52
6. Step 6: Final answer
   x = 2,970.20