Finding the Fourth Proportional to 61,010.37, 91,510.93 and 18,890.79

Step by Step Solution

1. Step 1: Write the proportion equation
   61,010.37 : 91,510.93 = 18,890.79 : x
2. Step 2: Convert to fraction form
   61,010.37/91,510.93 = 18,890.79/x
3. Step 3: Cross multiply
   61,010.37x = 91,510.93 × 18,890.79
4. Step 4: Simplify right side
   61,010.37x = 1,728,713,942.89
5. Step 5: Solve for x
   x = 1,728,713,942.89/61,010.37
6. Step 6: Final answer
   x = 28,334.76