Finding the Fourth Proportional to 77,478.69, 116,217.48 and 51,300.57

Step by Step Solution

1. Step 1: Write the proportion equation
   77,478.69 : 116,217.48 = 51,300.57 : x
2. Step 2: Convert to fraction form
   77,478.69/116,217.48 = 51,300.57/x
3. Step 3: Cross multiply
   77,478.69x = 116,217.48 × 51,300.57
4. Step 4: Simplify right side
   77,478.69x = 5,962,022,967.96
5. Step 5: Solve for x
   x = 5,962,022,967.96/77,478.69
6. Step 6: Final answer
   x = 76,950.49