Finding the Fourth Proportional to 8,780.01, 12,115.62 and 5,003.79

Step by Step Solution

1. Step 1: Write the proportion equation
   8,780.01 : 12,115.62 = 5,003.79 : x
2. Step 2: Convert to fraction form
   8,780.01/12,115.62 = 5,003.79/x
3. Step 3: Cross multiply
   8,780.01x = 12,115.62 × 5,003.79
4. Step 4: Simplify right side
   8,780.01x = 60,624,018.20
5. Step 5: Solve for x
   x = 60,624,018.20/8,780.01
6. Step 6: Final answer
   x = 6,904.78