Finding the Fourth Proportional to 120,971.81, 181,487.49 and 42,086.72

Step by Step Solution

1. Step 1: Write the proportion equation
   120,971.81 : 181,487.49 = 42,086.72 : x
2. Step 2: Convert to fraction form
   120,971.81/181,487.49 = 42,086.72/x
3. Step 3: Cross multiply
   120,971.81x = 181,487.49 × 42,086.72
4. Step 4: Simplify right side
   120,971.81x = 7,638,213,175.13
5. Step 5: Solve for x
   x = 7,638,213,175.13/120,971.81
6. Step 6: Final answer
   x = 63,140.44