Finding the Fourth Proportional to 9,899.32, 14,856.24 and 7,974.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,899.32 : 14,856.24 = 7,974.76 : x
2. Step 2: Convert to fraction form
   9,899.32/14,856.24 = 7,974.76/x
3. Step 3: Cross multiply
   9,899.32x = 14,856.24 × 7,974.76
4. Step 4: Simplify right side
   9,899.32x = 118,474,948.50
5. Step 5: Solve for x
   x = 118,474,948.50/9,899.32
6. Step 6: Final answer
   x = 11,967.99