Finding the Fourth Proportional to 99,722.43, 149,582.50 and 28,646.81

Step by Step Solution

1. Step 1: Write the proportion equation
   99,722.43 : 149,582.50 = 28,646.81 : x
2. Step 2: Convert to fraction form
   99,722.43/149,582.50 = 28,646.81/x
3. Step 3: Cross multiply
   99,722.43x = 149,582.50 × 28,646.81
4. Step 4: Simplify right side
   99,722.43x = 4,285,061,198.23
5. Step 5: Solve for x
   x = 4,285,061,198.23/99,722.43
6. Step 6: Final answer
   x = 42,969.88