Finding the Fourth Proportional to 65,193.12, 89,967.78 and 42,546.60

Step by Step Solution

1. Step 1: Write the proportion equation
   65,193.12 : 89,967.78 = 42,546.60 : x
2. Step 2: Convert to fraction form
   65,193.12/89,967.78 = 42,546.60/x
3. Step 3: Cross multiply
   65,193.12x = 89,967.78 × 42,546.60
4. Step 4: Simplify right side
   65,193.12x = 3,827,823,148.55
5. Step 5: Solve for x
   x = 3,827,823,148.55/65,193.12
6. Step 6: Final answer
   x = 58,715.14