Finding the Fourth Proportional to 65,992.21, 90,983.59 and 42,077.37

Step by Step Solution

1. Step 1: Write the proportion equation
   65,992.21 : 90,983.59 = 42,077.37 : x
2. Step 2: Convert to fraction form
   65,992.21/90,983.59 = 42,077.37/x
3. Step 3: Cross multiply
   65,992.21x = 90,983.59 × 42,077.37
4. Step 4: Simplify right side
   65,992.21x = 3,828,350,180.36
5. Step 5: Solve for x
   x = 3,828,350,180.36/65,992.21
6. Step 6: Final answer
   x = 58,012.15