Finding the Fourth Proportional to 9,990.43, 14,970.15 and 7,023.60

Step by Step Solution

1. Step 1: Write the proportion equation
   9,990.43 : 14,970.15 = 7,023.60 : x
2. Step 2: Convert to fraction form
   9,990.43/14,970.15 = 7,023.60/x
3. Step 3: Cross multiply
   9,990.43x = 14,970.15 × 7,023.60
4. Step 4: Simplify right side
   9,990.43x = 105,144,345.54
5. Step 5: Solve for x
   x = 105,144,345.54/9,990.43
6. Step 6: Final answer
   x = 10,524.51