Finding the Fourth Proportional to 51,066.56, 76,578.88 and 19,488.12

Step by Step Solution

1. Step 1: Write the proportion equation
   51,066.56 : 76,578.88 = 19,488.12 : x
2. Step 2: Convert to fraction form
   51,066.56/76,578.88 = 19,488.12/x
3. Step 3: Cross multiply
   51,066.56x = 76,578.88 × 19,488.12
4. Step 4: Simplify right side
   51,066.56x = 1,492,378,402.91
5. Step 5: Solve for x
   x = 1,492,378,402.91/51,066.56
6. Step 6: Final answer
   x = 29,224.18