Finding the Fourth Proportional to 69,131.90, 103,697.79 and 19,211.97

Step by Step Solution

1. Step 1: Write the proportion equation
   69,131.90 : 103,697.79 = 19,211.97 : x
2. Step 2: Convert to fraction form
   69,131.90/103,697.79 = 19,211.97/x
3. Step 3: Cross multiply
   69,131.90x = 103,697.79 × 19,211.97
4. Step 4: Simplify right side
   69,131.90x = 1,992,238,830.55
5. Step 5: Solve for x
   x = 1,992,238,830.55/69,131.90
6. Step 6: Final answer
   x = 28,817.94