Finding the Fourth Proportional to 52,287.96, 78,431.27 and 12,845.42

Step by Step Solution

1. Step 1: Write the proportion equation
   52,287.96 : 78,431.27 = 12,845.42 : x
2. Step 2: Convert to fraction form
   52,287.96/78,431.27 = 12,845.42/x
3. Step 3: Cross multiply
   52,287.96x = 78,431.27 × 12,845.42
4. Step 4: Simplify right side
   52,287.96x = 1,007,482,147.90
5. Step 5: Solve for x
   x = 1,007,482,147.90/52,287.96
6. Step 6: Final answer
   x = 19,267.96