Finding the Fourth Proportional to 15,152.37, 20,921.56 and 9,192.15

Step by Step Solution

1. Step 1: Write the proportion equation
   15,152.37 : 20,921.56 = 9,192.15 : x
2. Step 2: Convert to fraction form
   15,152.37/20,921.56 = 9,192.15/x
3. Step 3: Cross multiply
   15,152.37x = 20,921.56 × 9,192.15
4. Step 4: Simplify right side
   15,152.37x = 192,314,094.77
5. Step 5: Solve for x
   x = 192,314,094.77/15,152.37
6. Step 6: Final answer
   x = 12,692.02