Finding the Fourth Proportional to 77,139.69, 115,775.28 and 30,425.37

Step by Step Solution

1. Step 1: Write the proportion equation
   77,139.69 : 115,775.28 = 30,425.37 : x
2. Step 2: Convert to fraction form
   77,139.69/115,775.28 = 30,425.37/x
3. Step 3: Cross multiply
   77,139.69x = 115,775.28 × 30,425.37
4. Step 4: Simplify right side
   77,139.69x = 3,522,505,730.85
5. Step 5: Solve for x
   x = 3,522,505,730.85/77,139.69
6. Step 6: Final answer
   x = 45,663.99