Finding the Fourth Proportional to 11,864.31, 16,374.42 and 7,389.45

Step by Step Solution

1. Step 1: Write the proportion equation
   11,864.31 : 16,374.42 = 7,389.45 : x
2. Step 2: Convert to fraction form
   11,864.31/16,374.42 = 7,389.45/x
3. Step 3: Cross multiply
   11,864.31x = 16,374.42 × 7,389.45
4. Step 4: Simplify right side
   11,864.31x = 120,997,957.87
5. Step 5: Solve for x
   x = 120,997,957.87/11,864.31
6. Step 6: Final answer
   x = 10,198.48