Finding the Fourth Proportional to 28,071.99, 42,093.90 and 9,345.42

Step by Step Solution

1. Step 1: Write the proportion equation
   28,071.99 : 42,093.90 = 9,345.42 : x
2. Step 2: Convert to fraction form
   28,071.99/42,093.90 = 9,345.42/x
3. Step 3: Cross multiply
   28,071.99x = 42,093.90 × 9,345.42
4. Step 4: Simplify right side
   28,071.99x = 393,385,174.94
5. Step 5: Solve for x
   x = 393,385,174.94/28,071.99
6. Step 6: Final answer
   x = 14,013.44