Finding the Fourth Proportional to 236,707.56, 355,216.56 and 86,949.12

Step by Step Solution

1. Step 1: Write the proportion equation
   236,707.56 : 355,216.56 = 86,949.12 : x
2. Step 2: Convert to fraction form
   236,707.56/355,216.56 = 86,949.12/x
3. Step 3: Cross multiply
   236,707.56x = 355,216.56 × 86,949.12
4. Step 4: Simplify right side
   236,707.56x = 30,885,767,301.43
5. Step 5: Solve for x
   x = 30,885,767,301.43/236,707.56
6. Step 6: Final answer
   x = 130,480.70