Finding the Fourth Proportional to 70,449.72, 105,643.86 and 26,643

Step by Step Solution

1. Step 1: Write the proportion equation
   70,449.72 : 105,643.86 = 26,643 : x
2. Step 2: Convert to fraction form
   70,449.72/105,643.86 = 26,643/x
3. Step 3: Cross multiply
   70,449.72x = 105,643.86 × 26,643
4. Step 4: Simplify right side
   70,449.72x = 2,814,669,361.98
5. Step 5: Solve for x
   x = 2,814,669,361.98/70,449.72
6. Step 6: Final answer
   x = 39,952.88