Finding the Fourth Proportional to 72,684.32, 109,068.78 and 30,561.35

Step by Step Solution

1. Step 1: Write the proportion equation
   72,684.32 : 109,068.78 = 30,561.35 : x
2. Step 2: Convert to fraction form
   72,684.32/109,068.78 = 30,561.35/x
3. Step 3: Cross multiply
   72,684.32x = 109,068.78 × 30,561.35
4. Step 4: Simplify right side
   72,684.32x = 3,333,289,159.65
5. Step 5: Solve for x
   x = 3,333,289,159.65/72,684.32
6. Step 6: Final answer
   x = 45,859.81