Finding the Fourth Proportional to 65,706.72, 90,691.48 and 37,429.12

Step by Step Solution

1. Step 1: Write the proportion equation
   65,706.72 : 90,691.48 = 37,429.12 : x
2. Step 2: Convert to fraction form
   65,706.72/90,691.48 = 37,429.12/x
3. Step 3: Cross multiply
   65,706.72x = 90,691.48 × 37,429.12
4. Step 4: Simplify right side
   65,706.72x = 3,394,502,287.90
5. Step 5: Solve for x
   x = 3,394,502,287.90/65,706.72
6. Step 6: Final answer
   x = 51,661.42