Finding the Fourth Proportional to 11,971.89, 16,520.15 and 6,934.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,971.89 : 16,520.15 = 6,934.50 : x
2. Step 2: Convert to fraction form
   11,971.89/16,520.15 = 6,934.50/x
3. Step 3: Cross multiply
   11,971.89x = 16,520.15 × 6,934.50
4. Step 4: Simplify right side
   11,971.89x = 114,558,980.18
5. Step 5: Solve for x
   x = 114,558,980.18/11,971.89
6. Step 6: Final answer
   x = 9,569.00