Finding the Fourth Proportional to 65,931.36, 90,994.56 and 37,638.72

Step by Step Solution

1. Step 1: Write the proportion equation
   65,931.36 : 90,994.56 = 37,638.72 : x
2. Step 2: Convert to fraction form
   65,931.36/90,994.56 = 37,638.72/x
3. Step 3: Cross multiply
   65,931.36x = 90,994.56 × 37,638.72
4. Step 4: Simplify right side
   65,931.36x = 3,424,918,765.36
5. Step 5: Solve for x
   x = 3,424,918,765.36/65,931.36
6. Step 6: Final answer
   x = 51,946.73