Finding the Fourth Proportional to 72,723.66, 109,085.64 and 20,133.30

Step by Step Solution

1. Step 1: Write the proportion equation
   72,723.66 : 109,085.64 = 20,133.30 : x
2. Step 2: Convert to fraction form
   72,723.66/109,085.64 = 20,133.30/x
3. Step 3: Cross multiply
   72,723.66x = 109,085.64 × 20,133.30
4. Step 4: Simplify right side
   72,723.66x = 2,196,253,915.81
5. Step 5: Solve for x
   x = 2,196,253,915.81/72,723.66
6. Step 6: Final answer
   x = 30,199.99