Finding the Fourth Proportional to 11,899.32, 16,422.18 and 7,187.48

Step by Step Solution

1. Step 1: Write the proportion equation
   11,899.32 : 16,422.18 = 7,187.48 : x
2. Step 2: Convert to fraction form
   11,899.32/16,422.18 = 7,187.48/x
3. Step 3: Cross multiply
   11,899.32x = 16,422.18 × 7,187.48
4. Step 4: Simplify right side
   11,899.32x = 118,034,090.31
5. Step 5: Solve for x
   x = 118,034,090.31/11,899.32
6. Step 6: Final answer
   x = 9,919.40