Finding the Fourth Proportional to 286,061.65, 429,095.55 and 86,383.77

Step by Step Solution

1. Step 1: Write the proportion equation
   286,061.65 : 429,095.55 = 86,383.77 : x
2. Step 2: Convert to fraction form
   286,061.65/429,095.55 = 86,383.77/x
3. Step 3: Cross multiply
   286,061.65x = 429,095.55 × 86,383.77
4. Step 4: Simplify right side
   286,061.65x = 37,066,889,771.10
5. Step 5: Solve for x
   x = 37,066,889,771.10/286,061.65
6. Step 6: Final answer
   x = 129,576.58