Finding the Fourth Proportional to 81,751, 122,559.72 and 42,319.48

Step by Step Solution

1. Step 1: Write the proportion equation
   81,751 : 122,559.72 = 42,319.48 : x
2. Step 2: Convert to fraction form
   81,751/122,559.72 = 42,319.48/x
3. Step 3: Cross multiply
   81,751x = 122,559.72 × 42,319.48
4. Step 4: Simplify right side
   81,751x = 5,186,663,619.35
5. Step 5: Solve for x
   x = 5,186,663,619.35/81,751
6. Step 6: Final answer
   x = 63,444.65