Finding the Fourth Proportional to 301,617.72, 452,426.28 and 76,978.16

Step by Step Solution

1. Step 1: Write the proportion equation
   301,617.72 : 452,426.28 = 76,978.16 : x
2. Step 2: Convert to fraction form
   301,617.72/452,426.28 = 76,978.16/x
3. Step 3: Cross multiply
   301,617.72x = 452,426.28 × 76,978.16
4. Step 4: Simplify right side
   301,617.72x = 34,826,942,570.04
5. Step 5: Solve for x
   x = 34,826,942,570.04/301,617.72
6. Step 6: Final answer
   x = 115,467.16