Finding the Fourth Proportional to 286,017.82, 429,029.78 and 86,339.86

Step by Step Solution

1. Step 1: Write the proportion equation
   286,017.82 : 429,029.78 = 86,339.86 : x
2. Step 2: Convert to fraction form
   286,017.82/429,029.78 = 86,339.86/x
3. Step 3: Cross multiply
   286,017.82x = 429,029.78 × 86,339.86
4. Step 4: Simplify right side
   286,017.82x = 37,042,371,141.03
5. Step 5: Solve for x
   x = 37,042,371,141.03/286,017.82
6. Step 6: Final answer
   x = 129,510.71