Finding the Fourth Proportional to 69,436, 104,171.76 and 20,188

Step by Step Solution

1. Step 1: Write the proportion equation
   69,436 : 104,171.76 = 20,188 : x
2. Step 2: Convert to fraction form
   69,436/104,171.76 = 20,188/x
3. Step 3: Cross multiply
   69,436x = 104,171.76 × 20,188
4. Step 4: Simplify right side
   69,436x = 2,103,019,490.88
5. Step 5: Solve for x
   x = 2,103,019,490.88/69,436
6. Step 6: Final answer
   x = 30,287.16