Finding the Fourth Proportional to 100,758.34, 139,066.37 and 57,766.69

Step by Step Solution

1. Step 1: Write the proportion equation
   100,758.34 : 139,066.37 = 57,766.69 : x
2. Step 2: Convert to fraction form
   100,758.34/139,066.37 = 57,766.69/x
3. Step 3: Cross multiply
   100,758.34x = 139,066.37 × 57,766.69
4. Step 4: Simplify right side
   100,758.34x = 8,033,403,885.22
5. Step 5: Solve for x
   x = 8,033,403,885.22/100,758.34
6. Step 6: Final answer
   x = 79,729.42