Finding the Fourth Proportional to 10,298.66, 15,315.50 and 9,970.62

Step by Step Solution

1. Step 1: Write the proportion equation
   10,298.66 : 15,315.50 = 9,970.62 : x
2. Step 2: Convert to fraction form
   10,298.66/15,315.50 = 9,970.62/x
3. Step 3: Cross multiply
   10,298.66x = 15,315.50 × 9,970.62
4. Step 4: Simplify right side
   10,298.66x = 152,705,030.61
5. Step 5: Solve for x
   x = 152,705,030.61/10,298.66
6. Step 6: Final answer
   x = 14,827.66