Finding the Fourth Proportional to 81,809.24, 112,861.50 and 51,570.68

Step by Step Solution

1. Step 1: Write the proportion equation
   81,809.24 : 112,861.50 = 51,570.68 : x
2. Step 2: Convert to fraction form
   81,809.24/112,861.50 = 51,570.68/x
3. Step 3: Cross multiply
   81,809.24x = 112,861.50 × 51,570.68
4. Step 4: Simplify right side
   81,809.24x = 5,820,344,300.82
5. Step 5: Solve for x
   x = 5,820,344,300.82/81,809.24
6. Step 6: Final answer
   x = 71,145.32