Finding the Fourth Proportional to 10,787.31, 14,886.78 and 6,071.76

Step by Step Solution

1. Step 1: Write the proportion equation
   10,787.31 : 14,886.78 = 6,071.76 : x
2. Step 2: Convert to fraction form
   10,787.31/14,886.78 = 6,071.76/x
3. Step 3: Cross multiply
   10,787.31x = 14,886.78 × 6,071.76
4. Step 4: Simplify right side
   10,787.31x = 90,388,955.33
5. Step 5: Solve for x
   x = 90,388,955.33/10,787.31
6. Step 6: Final answer
   x = 8,379.19