Finding the Fourth Proportional to 136,467.67, 188,365.94 and 86,200.15

Step by Step Solution

1. Step 1: Write the proportion equation
   136,467.67 : 188,365.94 = 86,200.15 : x
2. Step 2: Convert to fraction form
   136,467.67/188,365.94 = 86,200.15/x
3. Step 3: Cross multiply
   136,467.67x = 188,365.94 × 86,200.15
4. Step 4: Simplify right side
   136,467.67x = 16,237,172,282.89
5. Step 5: Solve for x
   x = 16,237,172,282.89/136,467.67
6. Step 6: Final answer
   x = 118,981.82