Finding the Fourth Proportional to 9,201.86, 12,705.72 and 7,074.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,201.86 : 12,705.72 = 7,074.09 : x
2. Step 2: Convert to fraction form
   9,201.86/12,705.72 = 7,074.09/x
3. Step 3: Cross multiply
   9,201.86x = 12,705.72 × 7,074.09
4. Step 4: Simplify right side
   9,201.86x = 89,881,406.79
5. Step 5: Solve for x
   x = 89,881,406.79/9,201.86
6. Step 6: Final answer
   x = 9,767.75