Finding the Fourth Proportional to 28,373.83, 42,553.90 and 12,570.12

Step by Step Solution

1. Step 1: Write the proportion equation
   28,373.83 : 42,553.90 = 12,570.12 : x
2. Step 2: Convert to fraction form
   28,373.83/42,553.90 = 12,570.12/x
3. Step 3: Cross multiply
   28,373.83x = 42,553.90 × 12,570.12
4. Step 4: Simplify right side
   28,373.83x = 534,907,629.47
5. Step 5: Solve for x
   x = 534,907,629.47/28,373.83
6. Step 6: Final answer
   x = 18,852.15