Finding the Fourth Proportional to 77,216.72, 115,758.06 and 30,458.12

Step by Step Solution

1. Step 1: Write the proportion equation
   77,216.72 : 115,758.06 = 30,458.12 : x
2. Step 2: Convert to fraction form
   77,216.72/115,758.06 = 30,458.12/x
3. Step 3: Cross multiply
   77,216.72x = 115,758.06 × 30,458.12
4. Step 4: Simplify right side
   77,216.72x = 3,525,772,882.45
5. Step 5: Solve for x
   x = 3,525,772,882.45/77,216.72
6. Step 6: Final answer
   x = 45,660.74