Finding the Fourth Proportional to 282,099.31, 423,149.42 and 99,865.71

Step by Step Solution

1. Step 1: Write the proportion equation
   282,099.31 : 423,149.42 = 99,865.71 : x
2. Step 2: Convert to fraction form
   282,099.31/423,149.42 = 99,865.71/x
3. Step 3: Cross multiply
   282,099.31x = 423,149.42 × 99,865.71
4. Step 4: Simplify right side
   282,099.31x = 42,258,116,952.31
5. Step 5: Solve for x
   x = 42,258,116,952.31/282,099.31
6. Step 6: Final answer
   x = 149,798.73