Finding the Fourth Proportional to 81,669.14, 112,654.53 and 51,401.91

Step by Step Solution

1. Step 1: Write the proportion equation
   81,669.14 : 112,654.53 = 51,401.91 : x
2. Step 2: Convert to fraction form
   81,669.14/112,654.53 = 51,401.91/x
3. Step 3: Cross multiply
   81,669.14x = 112,654.53 × 51,401.91
4. Step 4: Simplify right side
   81,669.14x = 5,790,658,012.15
5. Step 5: Solve for x
   x = 5,790,658,012.15/81,669.14
6. Step 6: Final answer
   x = 70,903.87