Finding the Fourth Proportional to 10,385.92, 15,554.05 and 5,990.05

Step by Step Solution

1. Step 1: Write the proportion equation
   10,385.92 : 15,554.05 = 5,990.05 : x
2. Step 2: Convert to fraction form
   10,385.92/15,554.05 = 5,990.05/x
3. Step 3: Cross multiply
   10,385.92x = 15,554.05 × 5,990.05
4. Step 4: Simplify right side
   10,385.92x = 93,169,558.52
5. Step 5: Solve for x
   x = 93,169,558.52/10,385.92
6. Step 6: Final answer
   x = 8,970.76