Finding the Fourth Proportional to 7,980.81, 10,997.82 and 7,783.98

Step by Step Solution

1. Step 1: Write the proportion equation
   7,980.81 : 10,997.82 = 7,783.98 : x
2. Step 2: Convert to fraction form
   7,980.81/10,997.82 = 7,783.98/x
3. Step 3: Cross multiply
   7,980.81x = 10,997.82 × 7,783.98
4. Step 4: Simplify right side
   7,980.81x = 85,606,810.92
5. Step 5: Solve for x
   x = 85,606,810.92/7,980.81
6. Step 6: Final answer
   x = 10,726.58