Finding the Fourth Proportional to 40,748.67, 61,126.98 and 12,661.17

Step by Step Solution

1. Step 1: Write the proportion equation
   40,748.67 : 61,126.98 = 12,661.17 : x
2. Step 2: Convert to fraction form
   40,748.67/61,126.98 = 12,661.17/x
3. Step 3: Cross multiply
   40,748.67x = 61,126.98 × 12,661.17
4. Step 4: Simplify right side
   40,748.67x = 773,939,085.37
5. Step 5: Solve for x
   x = 773,939,085.37/40,748.67
6. Step 6: Final answer
   x = 18,992.99