Finding the Fourth Proportional to 12,631.50, 17,431.83 and 7,042.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,631.50 : 17,431.83 = 7,042.86 : x
2. Step 2: Convert to fraction form
   12,631.50/17,431.83 = 7,042.86/x
3. Step 3: Cross multiply
   12,631.50x = 17,431.83 × 7,042.86
4. Step 4: Simplify right side
   12,631.50x = 122,769,938.23
5. Step 5: Solve for x
   x = 122,769,938.23/12,631.50
6. Step 6: Final answer
   x = 9,719.35