Finding the Fourth Proportional to 72,703.70, 109,061.76 and 20,113.10

Step by Step Solution

1. Step 1: Write the proportion equation
   72,703.70 : 109,061.76 = 20,113.10 : x
2. Step 2: Convert to fraction form
   72,703.70/109,061.76 = 20,113.10/x
3. Step 3: Cross multiply
   72,703.70x = 109,061.76 × 20,113.10
4. Step 4: Simplify right side
   72,703.70x = 2,193,570,085.06
5. Step 5: Solve for x
   x = 2,193,570,085.06/72,703.70
6. Step 6: Final answer
   x = 30,171.37