Finding the Fourth Proportional to 10,858.79, 14,978.30 and 8,337.06

Step by Step Solution

1. Step 1: Write the proportion equation
   10,858.79 : 14,978.30 = 8,337.06 : x
2. Step 2: Convert to fraction form
   10,858.79/14,978.30 = 8,337.06/x
3. Step 3: Cross multiply
   10,858.79x = 14,978.30 × 8,337.06
4. Step 4: Simplify right side
   10,858.79x = 124,875,006.64
5. Step 5: Solve for x
   x = 124,875,006.64/10,858.79
6. Step 6: Final answer
   x = 11,499.90