Finding the Fourth Proportional to 315,642.72, 473,465.34 and 78,984.72

Step by Step Solution

1. Step 1: Write the proportion equation
   315,642.72 : 473,465.34 = 78,984.72 : x
2. Step 2: Convert to fraction form
   315,642.72/473,465.34 = 78,984.72/x
3. Step 3: Cross multiply
   315,642.72x = 473,465.34 × 78,984.72
4. Step 4: Simplify right side
   315,642.72x = 37,396,527,309.60
5. Step 5: Solve for x
   x = 37,396,527,309.60/315,642.72
6. Step 6: Final answer
   x = 118,477.40