Finding the Fourth Proportional to 53,900.16, 80,847.50 and 20,617.67

Step by Step Solution

1. Step 1: Write the proportion equation
   53,900.16 : 80,847.50 = 20,617.67 : x
2. Step 2: Convert to fraction form
   53,900.16/80,847.50 = 20,617.67/x
3. Step 3: Cross multiply
   53,900.16x = 80,847.50 × 20,617.67
4. Step 4: Simplify right side
   53,900.16x = 1,666,886,568.00
5. Step 5: Solve for x
   x = 1,666,886,568.00/53,900.16
6. Step 6: Final answer
   x = 30,925.45