Finding the Fourth Proportional to 70,674.79, 105,995.98 and 42,219.76

Step by Step Solution

1. Step 1: Write the proportion equation
   70,674.79 : 105,995.98 = 42,219.76 : x
2. Step 2: Convert to fraction form
   70,674.79/105,995.98 = 42,219.76/x
3. Step 3: Cross multiply
   70,674.79x = 105,995.98 × 42,219.76
4. Step 4: Simplify right side
   70,674.79x = 4,475,124,836.56
5. Step 5: Solve for x
   x = 4,475,124,836.56/70,674.79
6. Step 6: Final answer
   x = 63,319.96