Finding the Fourth Proportional to 407,454.52, 610,807.59 and 141,028.71

Step by Step Solution

1. Step 1: Write the proportion equation
   407,454.52 : 610,807.59 = 141,028.71 : x
2. Step 2: Convert to fraction form
   407,454.52/610,807.59 = 141,028.71/x
3. Step 3: Cross multiply
   407,454.52x = 610,807.59 × 141,028.71
4. Step 4: Simplify right side
   407,454.52x = 86,141,406,475.91
5. Step 5: Solve for x
   x = 86,141,406,475.91/407,454.52
6. Step 6: Final answer
   x = 211,413.55