Finding the Fourth Proportional to 81,342, 112,245.78 and 49,507.38

Step by Step Solution

1. Step 1: Write the proportion equation
   81,342 : 112,245.78 = 49,507.38 : x
2. Step 2: Convert to fraction form
   81,342/112,245.78 = 49,507.38/x
3. Step 3: Cross multiply
   81,342x = 112,245.78 × 49,507.38
4. Step 4: Simplify right side
   81,342x = 5,556,994,483.86
5. Step 5: Solve for x
   x = 5,556,994,483.86/81,342
6. Step 6: Final answer
   x = 68,316.42