Finding the Fourth Proportional to 9,368.55, 12,902.27 and 9,164.43

Step by Step Solution

1. Step 1: Write the proportion equation
   9,368.55 : 12,902.27 = 9,164.43 : x
2. Step 2: Convert to fraction form
   9,368.55/12,902.27 = 9,164.43/x
3. Step 3: Cross multiply
   9,368.55x = 12,902.27 × 9,164.43
4. Step 4: Simplify right side
   9,368.55x = 118,241,904.43
5. Step 5: Solve for x
   x = 118,241,904.43/9,368.55
6. Step 6: Final answer
   x = 12,621.15