Finding the Fourth Proportional to 236,709.56, 354,941.92 and 86,911.40

Step by Step Solution

1. Step 1: Write the proportion equation
   236,709.56 : 354,941.92 = 86,911.40 : x
2. Step 2: Convert to fraction form
   236,709.56/354,941.92 = 86,911.40/x
3. Step 3: Cross multiply
   236,709.56x = 354,941.92 × 86,911.40
4. Step 4: Simplify right side
   236,709.56x = 30,848,499,185.89
5. Step 5: Solve for x
   x = 30,848,499,185.89/236,709.56
6. Step 6: Final answer
   x = 130,322.15