Finding the Fourth Proportional to 315,628.53, 473,443.82 and 78,971.21

Step by Step Solution

1. Step 1: Write the proportion equation
   315,628.53 : 473,443.82 = 78,971.21 : x
2. Step 2: Convert to fraction form
   315,628.53/473,443.82 = 78,971.21/x
3. Step 3: Cross multiply
   315,628.53x = 473,443.82 × 78,971.21
4. Step 4: Simplify right side
   315,628.53x = 37,388,428,570.35
5. Step 5: Solve for x
   x = 37,388,428,570.35/315,628.53
6. Step 6: Final answer
   x = 118,457.06