Finding the Fourth Proportional to 9,983.34, 13,773.99 and 5,790.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,983.34 : 13,773.99 = 5,790.78 : x
2. Step 2: Convert to fraction form
   9,983.34/13,773.99 = 5,790.78/x
3. Step 3: Cross multiply
   9,983.34x = 13,773.99 × 5,790.78
4. Step 4: Simplify right side
   9,983.34x = 79,762,145.81
5. Step 5: Solve for x
   x = 79,762,145.81/9,983.34
6. Step 6: Final answer
   x = 7,989.53