Finding the Fourth Proportional to 28,062.99, 42,080.40 and 9,336.42

Step by Step Solution

1. Step 1: Write the proportion equation
   28,062.99 : 42,080.40 = 9,336.42 : x
2. Step 2: Convert to fraction form
   28,062.99/42,080.40 = 9,336.42/x
3. Step 3: Cross multiply
   28,062.99x = 42,080.40 × 9,336.42
4. Step 4: Simplify right side
   28,062.99x = 392,880,288.17
5. Step 5: Solve for x
   x = 392,880,288.17/28,062.99
6. Step 6: Final answer
   x = 13,999.94