Finding the Fourth Proportional to 77,290.10, 116,067.34 and 47,479.10

Step by Step Solution

1. Step 1: Write the proportion equation
   77,290.10 : 116,067.34 = 47,479.10 : x
2. Step 2: Convert to fraction form
   77,290.10/116,067.34 = 47,479.10/x
3. Step 3: Cross multiply
   77,290.10x = 116,067.34 × 47,479.10
4. Step 4: Simplify right side
   77,290.10x = 5,510,772,842.59
5. Step 5: Solve for x
   x = 5,510,772,842.59/77,290.10
6. Step 6: Final answer
   x = 71,299.85