Finding the Fourth Proportional to 115,315.89, 172,847.48 and 45,118.05

Step by Step Solution

1. Step 1: Write the proportion equation
   115,315.89 : 172,847.48 = 45,118.05 : x
2. Step 2: Convert to fraction form
   115,315.89/172,847.48 = 45,118.05/x
3. Step 3: Cross multiply
   115,315.89x = 172,847.48 × 45,118.05
4. Step 4: Simplify right side
   115,315.89x = 7,798,541,019.42
5. Step 5: Solve for x
   x = 7,798,541,019.42/115,315.89
6. Step 6: Final answer
   x = 67,627.64