Finding the Fourth Proportional to 5,018.72, 6,926.32 and 2,780.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,018.72 : 6,926.32 = 2,780.72 : x
2. Step 2: Convert to fraction form
   5,018.72/6,926.32 = 2,780.72/x
3. Step 3: Cross multiply
   5,018.72x = 6,926.32 × 2,780.72
4. Step 4: Simplify right side
   5,018.72x = 19,260,156.55
5. Step 5: Solve for x
   x = 19,260,156.55/5,018.72
6. Step 6: Final answer
   x = 3,837.66