Finding the Fourth Proportional to 61,060.49, 91,603.89 and 18,939.74

Step by Step Solution

1. Step 1: Write the proportion equation
   61,060.49 : 91,603.89 = 18,939.74 : x
2. Step 2: Convert to fraction form
   61,060.49/91,603.89 = 18,939.74/x
3. Step 3: Cross multiply
   61,060.49x = 91,603.89 × 18,939.74
4. Step 4: Simplify right side
   61,060.49x = 1,734,953,401.57
5. Step 5: Solve for x
   x = 1,734,953,401.57/61,060.49
6. Step 6: Final answer
   x = 28,413.69