Finding the Fourth Proportional to 109,196.40, 150,690.73 and 61,449.75

Step by Step Solution

1. Step 1: Write the proportion equation
   109,196.40 : 150,690.73 = 61,449.75 : x
2. Step 2: Convert to fraction form
   109,196.40/150,690.73 = 61,449.75/x
3. Step 3: Cross multiply
   109,196.40x = 150,690.73 × 61,449.75
4. Step 4: Simplify right side
   109,196.40x = 9,259,907,685.82
5. Step 5: Solve for x
   x = 9,259,907,685.82/109,196.40
6. Step 6: Final answer
   x = 84,800.49