Finding the Fourth Proportional to 8,978.72, 13,463.76 and 3,781.76

Step by Step Solution

1. Step 1: Write the proportion equation
   8,978.72 : 13,463.76 = 3,781.76 : x
2. Step 2: Convert to fraction form
   8,978.72/13,463.76 = 3,781.76/x
3. Step 3: Cross multiply
   8,978.72x = 13,463.76 × 3,781.76
4. Step 4: Simplify right side
   8,978.72x = 50,916,709.02
5. Step 5: Solve for x
   x = 50,916,709.02/8,978.72
6. Step 6: Final answer
   x = 5,670.82