Finding the Fourth Proportional to 9,778.82, 14,670.38 and 3,115.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,778.82 : 14,670.38 = 3,115.76 : x
2. Step 2: Convert to fraction form
   9,778.82/14,670.38 = 3,115.76/x
3. Step 3: Cross multiply
   9,778.82x = 14,670.38 × 3,115.76
4. Step 4: Simplify right side
   9,778.82x = 45,709,317.63
5. Step 5: Solve for x
   x = 45,709,317.63/9,778.82
6. Step 6: Final answer
   x = 4,674.32