Finding the Fourth Proportional to 10,887.86, 16,330.91 and 3,490.34

Step by Step Solution

1. Step 1: Write the proportion equation
   10,887.86 : 16,330.91 = 3,490.34 : x
2. Step 2: Convert to fraction form
   10,887.86/16,330.91 = 3,490.34/x
3. Step 3: Cross multiply
   10,887.86x = 16,330.91 × 3,490.34
4. Step 4: Simplify right side
   10,887.86x = 57,000,329.30
5. Step 5: Solve for x
   x = 57,000,329.30/10,887.86
6. Step 6: Final answer
   x = 5,235.22