Finding the Fourth Proportional to 81,749, 122,556.72 and 42,317.48

Step by Step Solution

1. Step 1: Write the proportion equation
   81,749 : 122,556.72 = 42,317.48 : x
2. Step 2: Convert to fraction form
   81,749/122,556.72 = 42,317.48/x
3. Step 3: Cross multiply
   81,749x = 122,556.72 × 42,317.48
4. Step 4: Simplify right side
   81,749x = 5,186,291,547.47
5. Step 5: Solve for x
   x = 5,186,291,547.47/81,749
6. Step 6: Final answer
   x = 63,441.65