Finding the Fourth Proportional to 103,066.50, 142,237.61 and 57,759.09

Step by Step Solution

1. Step 1: Write the proportion equation
   103,066.50 : 142,237.61 = 57,759.09 : x
2. Step 2: Convert to fraction form
   103,066.50/142,237.61 = 57,759.09/x
3. Step 3: Cross multiply
   103,066.50x = 142,237.61 × 57,759.09
4. Step 4: Simplify right side
   103,066.50x = 8,215,514,206.19
5. Step 5: Solve for x
   x = 8,215,514,206.19/103,066.50
6. Step 6: Final answer
   x = 79,710.81