Finding the Fourth Proportional to 11,926.31, 16,455.69 and 7,210.49

Step by Step Solution

1. Step 1: Write the proportion equation
   11,926.31 : 16,455.69 = 7,210.49 : x
2. Step 2: Convert to fraction form
   11,926.31/16,455.69 = 7,210.49/x
3. Step 3: Cross multiply
   11,926.31x = 16,455.69 × 7,210.49
4. Step 4: Simplify right side
   11,926.31x = 118,653,505.91
5. Step 5: Solve for x
   x = 118,653,505.91/11,926.31
6. Step 6: Final answer
   x = 9,948.89