Finding the Fourth Proportional to 65,189.75, 89,963.12 and 42,543.23

Step by Step Solution

1. Step 1: Write the proportion equation
   65,189.75 : 89,963.12 = 42,543.23 : x
2. Step 2: Convert to fraction form
   65,189.75/89,963.12 = 42,543.23/x
3. Step 3: Cross multiply
   65,189.75x = 89,963.12 × 42,543.23
4. Step 4: Simplify right side
   65,189.75x = 3,827,321,362.22
5. Step 5: Solve for x
   x = 3,827,321,362.22/65,189.75
6. Step 6: Final answer
   x = 58,710.48