Finding the Fourth Proportional to 105,586.88, 145,642.77 and 69,290.68

Step by Step Solution

1. Step 1: Write the proportion equation
   105,586.88 : 145,642.77 = 69,290.68 : x
2. Step 2: Convert to fraction form
   105,586.88/145,642.77 = 69,290.68/x
3. Step 3: Cross multiply
   105,586.88x = 145,642.77 × 69,290.68
4. Step 4: Simplify right side
   105,586.88x = 10,091,686,570.38
5. Step 5: Solve for x
   x = 10,091,686,570.38/105,586.88
6. Step 6: Final answer
   x = 95,577.09