Finding the Fourth Proportional to 65,214.48, 89,963.94 and 42,543

Step by Step Solution

1. Step 1: Write the proportion equation
   65,214.48 : 89,963.94 = 42,543 : x
2. Step 2: Convert to fraction form
   65,214.48/89,963.94 = 42,543/x
3. Step 3: Cross multiply
   65,214.48x = 89,963.94 × 42,543
4. Step 4: Simplify right side
   65,214.48x = 3,827,335,899.42
5. Step 5: Solve for x
   x = 3,827,335,899.42/65,214.48
6. Step 6: Final answer
   x = 58,688.44