Finding the Fourth Proportional to 136,149.39, 204,010.71 and 86,123.82

Step by Step Solution

1. Step 1: Write the proportion equation
   136,149.39 : 204,010.71 = 86,123.82 : x
2. Step 2: Convert to fraction form
   136,149.39/204,010.71 = 86,123.82/x
3. Step 3: Cross multiply
   136,149.39x = 204,010.71 × 86,123.82
4. Step 4: Simplify right side
   136,149.39x = 17,570,181,666.11
5. Step 5: Solve for x
   x = 17,570,181,666.11/136,149.39
6. Step 6: Final answer
   x = 129,050.76