Finding the Fourth Proportional to 70,473.71, 105,705.04 and 19,870.69

Step by Step Solution

1. Step 1: Write the proportion equation
   70,473.71 : 105,705.04 = 19,870.69 : x
2. Step 2: Convert to fraction form
   70,473.71/105,705.04 = 19,870.69/x
3. Step 3: Cross multiply
   70,473.71x = 105,705.04 × 19,870.69
4. Step 4: Simplify right side
   70,473.71x = 2,100,431,866.69
5. Step 5: Solve for x
   x = 2,100,431,866.69/70,473.71
6. Step 6: Final answer
   x = 29,804.48