Finding the Fourth Proportional to 28,019.86, 42,031.50 and 9,046.42

Step by Step Solution

1. Step 1: Write the proportion equation
   28,019.86 : 42,031.50 = 9,046.42 : x
2. Step 2: Convert to fraction form
   28,019.86/42,031.50 = 9,046.42/x
3. Step 3: Cross multiply
   28,019.86x = 42,031.50 × 9,046.42
4. Step 4: Simplify right side
   28,019.86x = 380,234,602.23
5. Step 5: Solve for x
   x = 380,234,602.23/28,019.86
6. Step 6: Final answer
   x = 13,570.18