Finding the Fourth Proportional to 8,061.60, 11,994.86 and 7,860.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,061.60 : 11,994.86 = 7,860.72 : x
2. Step 2: Convert to fraction form
   8,061.60/11,994.86 = 7,860.72/x
3. Step 3: Cross multiply
   8,061.60x = 11,994.86 × 7,860.72
4. Step 4: Simplify right side
   8,061.60x = 94,288,235.90
5. Step 5: Solve for x
   x = 94,288,235.90/8,061.60
6. Step 6: Final answer
   x = 11,695.97