Finding the Fourth Proportional to 70,966.72, 105,824.04 and 67,478.56

Step by Step Solution

1. Step 1: Write the proportion equation
   70,966.72 : 105,824.04 = 67,478.56 : x
2. Step 2: Convert to fraction form
   70,966.72/105,824.04 = 67,478.56/x
3. Step 3: Cross multiply
   70,966.72x = 105,824.04 × 67,478.56
4. Step 4: Simplify right side
   70,966.72x = 7,140,853,832.58
5. Step 5: Solve for x
   x = 7,140,853,832.58/70,966.72
6. Step 6: Final answer
   x = 100,622.57