Finding the Fourth Proportional to 92,665, 139,020.72 and 42,779.98

Step by Step Solution

1. Step 1: Write the proportion equation
   92,665 : 139,020.72 = 42,779.98 : x
2. Step 2: Convert to fraction form
   92,665/139,020.72 = 42,779.98/x
3. Step 3: Cross multiply
   92,665x = 139,020.72 × 42,779.98
4. Step 4: Simplify right side
   92,665x = 5,947,303,621.19
5. Step 5: Solve for x
   x = 5,947,303,621.19/92,665
6. Step 6: Final answer
   x = 64,180.69