Finding the Fourth Proportional to 69,978.62, 104,968.04 and 21,292.35

Step by Step Solution

1. Step 1: Write the proportion equation
   69,978.62 : 104,968.04 = 21,292.35 : x
2. Step 2: Convert to fraction form
   69,978.62/104,968.04 = 21,292.35/x
3. Step 3: Cross multiply
   69,978.62x = 104,968.04 × 21,292.35
4. Step 4: Simplify right side
   69,978.62x = 2,235,016,140.03
5. Step 5: Solve for x
   x = 2,235,016,140.03/69,978.62
6. Step 6: Final answer
   x = 31,938.56