Finding the Fourth Proportional to 65,867.52, 90,905.76 and 37,578.72

Step by Step Solution

1. Step 1: Write the proportion equation
   65,867.52 : 90,905.76 = 37,578.72 : x
2. Step 2: Convert to fraction form
   65,867.52/90,905.76 = 37,578.72/x
3. Step 3: Cross multiply
   65,867.52x = 90,905.76 × 37,578.72
4. Step 4: Simplify right side
   65,867.52x = 3,416,122,101.43
5. Step 5: Solve for x
   x = 3,416,122,101.43/65,867.52
6. Step 6: Final answer
   x = 51,863.53