Finding the Fourth Proportional to 61,061.49, 91,605.39 and 18,940.74

Step by Step Solution

1. Step 1: Write the proportion equation
   61,061.49 : 91,605.39 = 18,940.74 : x
2. Step 2: Convert to fraction form
   61,061.49/91,605.39 = 18,940.74/x
3. Step 3: Cross multiply
   61,061.49x = 91,605.39 × 18,940.74
4. Step 4: Simplify right side
   61,061.49x = 1,735,073,874.59
5. Step 5: Solve for x
   x = 1,735,073,874.59/61,061.49
6. Step 6: Final answer
   x = 28,415.19