Finding the Fourth Proportional to 70,325.91, 105,488.06 and 28,216.71

Step by Step Solution

1. Step 1: Write the proportion equation
   70,325.91 : 105,488.06 = 28,216.71 : x
2. Step 2: Convert to fraction form
   70,325.91/105,488.06 = 28,216.71/x
3. Step 3: Cross multiply
   70,325.91x = 105,488.06 × 28,216.71
4. Step 4: Simplify right side
   70,325.91x = 2,976,525,856.40
5. Step 5: Solve for x
   x = 2,976,525,856.40/70,325.91
6. Step 6: Final answer
   x = 42,324.74