Finding the Fourth Proportional to 28,064.50, 42,118.16 and 10,311.99

Step by Step Solution

1. Step 1: Write the proportion equation
   28,064.50 : 42,118.16 = 10,311.99 : x
2. Step 2: Convert to fraction form
   28,064.50/42,118.16 = 10,311.99/x
3. Step 3: Cross multiply
   28,064.50x = 42,118.16 × 10,311.99
4. Step 4: Simplify right side
   28,064.50x = 434,322,044.74
5. Step 5: Solve for x
   x = 434,322,044.74/28,064.50
6. Step 6: Final answer
   x = 15,475.85