Finding the Fourth Proportional to 10,111.37, 15,156.79 and 3,869.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,111.37 : 15,156.79 = 3,869.78 : x
2. Step 2: Convert to fraction form
   10,111.37/15,156.79 = 3,869.78/x
3. Step 3: Cross multiply
   10,111.37x = 15,156.79 × 3,869.78
4. Step 4: Simplify right side
   10,111.37x = 58,653,357.35
5. Step 5: Solve for x
   x = 58,653,357.35/10,111.37
6. Step 6: Final answer
   x = 5,800.74