Finding the Fourth Proportional to 110,690, 152,752.20 and 65,978

Step by Step Solution

1. Step 1: Write the proportion equation
   110,690 : 152,752.20 = 65,978 : x
2. Step 2: Convert to fraction form
   110,690/152,752.20 = 65,978/x
3. Step 3: Cross multiply
   110,690x = 152,752.20 × 65,978
4. Step 4: Simplify right side
   110,690x = 10,078,284,651.60
5. Step 5: Solve for x
   x = 10,078,284,651.60/110,690
6. Step 6: Final answer
   x = 91,049.64