Finding the Fourth Proportional to 399,012.82, 598,513.29 and 185,661.25

Step by Step Solution

1. Step 1: Write the proportion equation
   399,012.82 : 598,513.29 = 185,661.25 : x
2. Step 2: Convert to fraction form
   399,012.82/598,513.29 = 185,661.25/x
3. Step 3: Cross multiply
   399,012.82x = 598,513.29 × 185,661.25
4. Step 4: Simplify right side
   399,012.82x = 111,120,725,563.01
5. Step 5: Solve for x
   x = 111,120,725,563.01/399,012.82
6. Step 6: Final answer
   x = 278,489.11