Finding the Fourth Proportional to 73,920.89, 101,985.53 and 42,081.81

Step by Step Solution

1. Step 1: Write the proportion equation
   73,920.89 : 101,985.53 = 42,081.81 : x
2. Step 2: Convert to fraction form
   73,920.89/101,985.53 = 42,081.81/x
3. Step 3: Cross multiply
   73,920.89x = 101,985.53 × 42,081.81
4. Step 4: Simplify right side
   73,920.89x = 4,291,735,485.80
5. Step 5: Solve for x
   x = 4,291,735,485.80/73,920.89
6. Step 6: Final answer
   x = 58,058.50