Finding the Fourth Proportional to 10,091.54, 15,116.47 and 5,918.99

Step by Step Solution

1. Step 1: Write the proportion equation
   10,091.54 : 15,116.47 = 5,918.99 : x
2. Step 2: Convert to fraction form
   10,091.54/15,116.47 = 5,918.99/x
3. Step 3: Cross multiply
   10,091.54x = 15,116.47 × 5,918.99
4. Step 4: Simplify right side
   10,091.54x = 89,474,234.77
5. Step 5: Solve for x
   x = 89,474,234.77/10,091.54
6. Step 6: Final answer
   x = 8,866.26