Finding the Fourth Proportional to 10,188.04, 15,212.72 and 8,992.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,188.04 : 15,212.72 = 8,992.12 : x
2. Step 2: Convert to fraction form
   10,188.04/15,212.72 = 8,992.12/x
3. Step 3: Cross multiply
   10,188.04x = 15,212.72 × 8,992.12
4. Step 4: Simplify right side
   10,188.04x = 136,794,603.77
5. Step 5: Solve for x
   x = 136,794,603.77/10,188.04
6. Step 6: Final answer
   x = 13,426.98