Finding the Fourth Proportional to 286,063.05, 429,097.83 and 86,385.09

Step by Step Solution

1. Step 1: Write the proportion equation
   286,063.05 : 429,097.83 = 86,385.09 : x
2. Step 2: Convert to fraction form
   286,063.05/429,097.83 = 86,385.09/x
3. Step 3: Cross multiply
   286,063.05x = 429,097.83 × 86,385.09
4. Step 4: Simplify right side
   286,063.05x = 37,067,654,663.35
5. Step 5: Solve for x
   x = 37,067,654,663.35/286,063.05
6. Step 6: Final answer
   x = 129,578.62