Finding the Fourth Proportional to 69,790.39, 104,686.22 and 19,870.45

Step by Step Solution

1. Step 1: Write the proportion equation
   69,790.39 : 104,686.22 = 19,870.45 : x
2. Step 2: Convert to fraction form
   69,790.39/104,686.22 = 19,870.45/x
3. Step 3: Cross multiply
   69,790.39x = 104,686.22 × 19,870.45
4. Step 4: Simplify right side
   69,790.39x = 2,080,162,300.20
5. Step 5: Solve for x
   x = 2,080,162,300.20/69,790.39
6. Step 6: Final answer
   x = 29,805.86