Finding the Fourth Proportional to 51,345.72, 70,857.06 and 31,209.08

Step by Step Solution

1. Step 1: Write the proportion equation
   51,345.72 : 70,857.06 = 31,209.08 : x
2. Step 2: Convert to fraction form
   51,345.72/70,857.06 = 31,209.08/x
3. Step 3: Cross multiply
   51,345.72x = 70,857.06 × 31,209.08
4. Step 4: Simplify right side
   51,345.72x = 2,211,383,654.10
5. Step 5: Solve for x
   x = 2,211,383,654.10/51,345.72
6. Step 6: Final answer
   x = 43,068.51