Finding the Fourth Proportional to 286,099.94, 429,227.31 and 86,426.84

Step by Step Solution

1. Step 1: Write the proportion equation
   286,099.94 : 429,227.31 = 86,426.84 : x
2. Step 2: Convert to fraction form
   286,099.94/429,227.31 = 86,426.84/x
3. Step 3: Cross multiply
   286,099.94x = 429,227.31 × 86,426.84
4. Step 4: Simplify right side
   286,099.94x = 37,096,760,045.00
5. Step 5: Solve for x
   x = 37,096,760,045.00/286,099.94
6. Step 6: Final answer
   x = 129,663.64