Finding the Fourth Proportional to 85,435.62, 117,892.42 and 49,633.21

Step by Step Solution

1. Step 1: Write the proportion equation
   85,435.62 : 117,892.42 = 49,633.21 : x
2. Step 2: Convert to fraction form
   85,435.62/117,892.42 = 49,633.21/x
3. Step 3: Cross multiply
   85,435.62x = 117,892.42 × 49,633.21
4. Step 4: Simplify right side
   85,435.62x = 5,851,379,239.27
5. Step 5: Solve for x
   x = 5,851,379,239.27/85,435.62
6. Step 6: Final answer
   x = 68,488.75