Finding the Fourth Proportional to 22,485.72, 31,030.40 and 12,413.98

Step by Step Solution

1. Step 1: Write the proportion equation
   22,485.72 : 31,030.40 = 12,413.98 : x
2. Step 2: Convert to fraction form
   22,485.72/31,030.40 = 12,413.98/x
3. Step 3: Cross multiply
   22,485.72x = 31,030.40 × 12,413.98
4. Step 4: Simplify right side
   22,485.72x = 385,210,764.99
5. Step 5: Solve for x
   x = 385,210,764.99/22,485.72
6. Step 6: Final answer
   x = 17,131.35