Finding the Fourth Proportional to 9,123.84, 12,591.36 and 5,091.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,123.84 : 12,591.36 = 5,091.12 : x
2. Step 2: Convert to fraction form
   9,123.84/12,591.36 = 5,091.12/x
3. Step 3: Cross multiply
   9,123.84x = 12,591.36 × 5,091.12
4. Step 4: Simplify right side
   9,123.84x = 64,104,124.72
5. Step 5: Solve for x
   x = 64,104,124.72/9,123.84
6. Step 6: Final answer
   x = 7,026.00