Finding the Fourth Proportional to 65,018.94, 97,518.45 and 20,639.94

Step by Step Solution

1. Step 1: Write the proportion equation
   65,018.94 : 97,518.45 = 20,639.94 : x
2. Step 2: Convert to fraction form
   65,018.94/97,518.45 = 20,639.94/x
3. Step 3: Cross multiply
   65,018.94x = 97,518.45 × 20,639.94
4. Step 4: Simplify right side
   65,018.94x = 2,012,774,956.89
5. Step 5: Solve for x
   x = 2,012,774,956.89/65,018.94
6. Step 6: Final answer
   x = 30,956.75