Finding the Fourth Proportional to 65,738.34, 90,725.29 and 38,889.50

Step by Step Solution

1. Step 1: Write the proportion equation
   65,738.34 : 90,725.29 = 38,889.50 : x
2. Step 2: Convert to fraction form
   65,738.34/90,725.29 = 38,889.50/x
3. Step 3: Cross multiply
   65,738.34x = 90,725.29 × 38,889.50
4. Step 4: Simplify right side
   65,738.34x = 3,528,260,614.60
5. Step 5: Solve for x
   x = 3,528,260,614.60/65,738.34
6. Step 6: Final answer
   x = 53,671.28