Finding the Fourth Proportional to 65,575.48, 90,592.88 and 42,968.20

Step by Step Solution

1. Step 1: Write the proportion equation
   65,575.48 : 90,592.88 = 42,968.20 : x
2. Step 2: Convert to fraction form
   65,575.48/90,592.88 = 42,968.20/x
3. Step 3: Cross multiply
   65,575.48x = 90,592.88 × 42,968.20
4. Step 4: Simplify right side
   65,575.48x = 3,892,612,986.42
5. Step 5: Solve for x
   x = 3,892,612,986.42/65,575.48
6. Step 6: Final answer
   x = 59,360.80