Finding the Fourth Proportional to 72,861, 109,218.54 and 28,426.62

Step by Step Solution

1. Step 1: Write the proportion equation
   72,861 : 109,218.54 = 28,426.62 : x
2. Step 2: Convert to fraction form
   72,861/109,218.54 = 28,426.62/x
3. Step 3: Cross multiply
   72,861x = 109,218.54 × 28,426.62
4. Step 4: Simplify right side
   72,861x = 3,104,713,933.53
5. Step 5: Solve for x
   x = 3,104,713,933.53/72,861
6. Step 6: Final answer
   x = 42,611.46