Finding the Fourth Proportional to 228,598.67, 342,801.72 and 86,419.98

Step by Step Solution

1. Step 1: Write the proportion equation
   228,598.67 : 342,801.72 = 86,419.98 : x
2. Step 2: Convert to fraction form
   228,598.67/342,801.72 = 86,419.98/x
3. Step 3: Cross multiply
   228,598.67x = 342,801.72 × 86,419.98
4. Step 4: Simplify right side
   228,598.67x = 29,624,917,786.37
5. Step 5: Solve for x
   x = 29,624,917,786.37/228,598.67
6. Step 6: Final answer
   x = 129,593.57