Finding the Fourth Proportional to 77,949.72, 107,498.88 and 51,082.47

Step by Step Solution

1. Step 1: Write the proportion equation
   77,949.72 : 107,498.88 = 51,082.47 : x
2. Step 2: Convert to fraction form
   77,949.72/107,498.88 = 51,082.47/x
3. Step 3: Cross multiply
   77,949.72x = 107,498.88 × 51,082.47
4. Step 4: Simplify right side
   77,949.72x = 5,491,308,312.63
5. Step 5: Solve for x
   x = 5,491,308,312.63/77,949.72
6. Step 6: Final answer
   x = 70,446.80