Finding the Fourth Proportional to 70,423.32, 105,632.82 and 28,839

Step by Step Solution

1. Step 1: Write the proportion equation
   70,423.32 : 105,632.82 = 28,839 : x
2. Step 2: Convert to fraction form
   70,423.32/105,632.82 = 28,839/x
3. Step 3: Cross multiply
   70,423.32x = 105,632.82 × 28,839
4. Step 4: Simplify right side
   70,423.32x = 3,046,344,895.98
5. Step 5: Solve for x
   x = 3,046,344,895.98/70,423.32
6. Step 6: Final answer
   x = 43,257.62