Finding the Fourth Proportional to 70,713.90, 106,057.89 and 28,591.74

Step by Step Solution

1. Step 1: Write the proportion equation
   70,713.90 : 106,057.89 = 28,591.74 : x
2. Step 2: Convert to fraction form
   70,713.90/106,057.89 = 28,591.74/x
3. Step 3: Cross multiply
   70,713.90x = 106,057.89 × 28,591.74
4. Step 4: Simplify right side
   70,713.90x = 3,032,379,615.83
5. Step 5: Solve for x
   x = 3,032,379,615.83/70,713.90
6. Step 6: Final answer
   x = 42,882.37