Finding the Fourth Proportional to 28,142.37, 42,192.90 and 13,333.95

Step by Step Solution

1. Step 1: Write the proportion equation
   28,142.37 : 42,192.90 = 13,333.95 : x
2. Step 2: Convert to fraction form
   28,142.37/42,192.90 = 13,333.95/x
3. Step 3: Cross multiply
   28,142.37x = 42,192.90 × 13,333.95
4. Step 4: Simplify right side
   28,142.37x = 562,598,018.96
5. Step 5: Solve for x
   x = 562,598,018.96/28,142.37
6. Step 6: Final answer
   x = 19,991.14