Finding the Fourth Proportional to 140,309, 193,690.16 and 89,391.56

Step by Step Solution

1. Step 1: Write the proportion equation
   140,309 : 193,690.16 = 89,391.56 : x
2. Step 2: Convert to fraction form
   140,309/193,690.16 = 89,391.56/x
3. Step 3: Cross multiply
   140,309x = 193,690.16 × 89,391.56
4. Step 4: Simplify right side
   140,309x = 17,314,265,559.05
5. Step 5: Solve for x
   x = 17,314,265,559.05/140,309
6. Step 6: Final answer
   x = 123,400.96