Finding the Fourth Proportional to 72,929.61, 109,400.76 and 20,339.01

Step by Step Solution

1. Step 1: Write the proportion equation
   72,929.61 : 109,400.76 = 20,339.01 : x
2. Step 2: Convert to fraction form
   72,929.61/109,400.76 = 20,339.01/x
3. Step 3: Cross multiply
   72,929.61x = 109,400.76 × 20,339.01
4. Step 4: Simplify right side
   72,929.61x = 2,225,103,151.65
5. Step 5: Solve for x
   x = 2,225,103,151.65/72,929.61
6. Step 6: Final answer
   x = 30,510.28