Finding the Fourth Proportional to 123,978, 185,973.48 and 40,872

Step by Step Solution

1. Step 1: Write the proportion equation
   123,978 : 185,973.48 = 40,872 : x
2. Step 2: Convert to fraction form
   123,978/185,973.48 = 40,872/x
3. Step 3: Cross multiply
   123,978x = 185,973.48 × 40,872
4. Step 4: Simplify right side
   123,978x = 7,601,108,074.56
5. Step 5: Solve for x
   x = 7,601,108,074.56/123,978
6. Step 6: Final answer
   x = 61,310.14