Finding the Fourth Proportional to 28,042.98, 42,055.37 and 9,317.99

Step by Step Solution

1. Step 1: Write the proportion equation
   28,042.98 : 42,055.37 = 9,317.99 : x
2. Step 2: Convert to fraction form
   28,042.98/42,055.37 = 9,317.99/x
3. Step 3: Cross multiply
   28,042.98x = 42,055.37 × 9,317.99
4. Step 4: Simplify right side
   28,042.98x = 391,871,452.89
5. Step 5: Solve for x
   x = 391,871,452.89/28,042.98
6. Step 6: Final answer
   x = 13,973.96