Finding the Fourth Proportional to 11,588.21, 15,990.53 and 7,112.15

Step by Step Solution

1. Step 1: Write the proportion equation
   11,588.21 : 15,990.53 = 7,112.15 : x
2. Step 2: Convert to fraction form
   11,588.21/15,990.53 = 7,112.15/x
3. Step 3: Cross multiply
   11,588.21x = 15,990.53 × 7,112.15
4. Step 4: Simplify right side
   11,588.21x = 113,727,047.94
5. Step 5: Solve for x
   x = 113,727,047.94/11,588.21
6. Step 6: Final answer
   x = 9,814.03