Finding the Fourth Proportional to 408,131.69, 612,373.88 and 155,488.07

Step by Step Solution

1. Step 1: Write the proportion equation
   408,131.69 : 612,373.88 = 155,488.07 : x
2. Step 2: Convert to fraction form
   408,131.69/612,373.88 = 155,488.07/x
3. Step 3: Cross multiply
   408,131.69x = 612,373.88 × 155,488.07
4. Step 4: Simplify right side
   408,131.69x = 95,216,834,639.27
5. Step 5: Solve for x
   x = 95,216,834,639.27/408,131.69
6. Step 6: Final answer
   x = 233,299.30