Finding the Fourth Proportional to 85,530.18, 118,023.48 and 49,719.72

Step by Step Solution

1. Step 1: Write the proportion equation
   85,530.18 : 118,023.48 = 49,719.72 : x
2. Step 2: Convert to fraction form
   85,530.18/118,023.48 = 49,719.72/x
3. Step 3: Cross multiply
   85,530.18x = 118,023.48 × 49,719.72
4. Step 4: Simplify right side
   85,530.18x = 5,868,094,379.03
5. Step 5: Solve for x
   x = 5,868,094,379.03/85,530.18
6. Step 6: Final answer
   x = 68,608.47