Finding the Fourth Proportional to 9,991.76, 13,787.01 and 5,741.99

Step by Step Solution

1. Step 1: Write the proportion equation
   9,991.76 : 13,787.01 = 5,741.99 : x
2. Step 2: Convert to fraction form
   9,991.76/13,787.01 = 5,741.99/x
3. Step 3: Cross multiply
   9,991.76x = 13,787.01 × 5,741.99
4. Step 4: Simplify right side
   9,991.76x = 79,164,856.32
5. Step 5: Solve for x
   x = 79,164,856.32/9,991.76
6. Step 6: Final answer
   x = 7,923.02