Finding the Fourth Proportional to 70,414.74, 105,622.72 and 56,339.89

Step by Step Solution

1. Step 1: Write the proportion equation
   70,414.74 : 105,622.72 = 56,339.89 : x
2. Step 2: Convert to fraction form
   70,414.74/105,622.72 = 56,339.89/x
3. Step 3: Cross multiply
   70,414.74x = 105,622.72 × 56,339.89
4. Step 4: Simplify right side
   70,414.74x = 5,950,772,021.39
5. Step 5: Solve for x
   x = 5,950,772,021.39/70,414.74
6. Step 6: Final answer
   x = 84,510.32