Finding the Fourth Proportional to 61,061.31, 91,605.11 and 18,940.54

Step by Step Solution

1. Step 1: Write the proportion equation
   61,061.31 : 91,605.11 = 18,940.54 : x
2. Step 2: Convert to fraction form
   61,061.31/91,605.11 = 18,940.54/x
3. Step 3: Cross multiply
   61,061.31x = 91,605.11 × 18,940.54
4. Step 4: Simplify right side
   61,061.31x = 1,735,050,250.16
5. Step 5: Solve for x
   x = 1,735,050,250.16/61,061.31
6. Step 6: Final answer
   x = 28,414.89