Finding the Fourth Proportional to 208,413.72, 287,610.54 and 112,923

Step by Step Solution

1. Step 1: Write the proportion equation
   208,413.72 : 287,610.54 = 112,923 : x
2. Step 2: Convert to fraction form
   208,413.72/287,610.54 = 112,923/x
3. Step 3: Cross multiply
   208,413.72x = 287,610.54 × 112,923
4. Step 4: Simplify right side
   208,413.72x = 32,477,845,008.42
5. Step 5: Solve for x
   x = 32,477,845,008.42/208,413.72
6. Step 6: Final answer
   x = 155,833.53