Finding the Fourth Proportional to 109,150.90, 150,636.99 and 61,401.40

Step by Step Solution

1. Step 1: Write the proportion equation
   109,150.90 : 150,636.99 = 61,401.40 : x
2. Step 2: Convert to fraction form
   109,150.90/150,636.99 = 61,401.40/x
3. Step 3: Cross multiply
   109,150.90x = 150,636.99 × 61,401.40
4. Step 4: Simplify right side
   109,150.90x = 9,249,322,077.79
5. Step 5: Solve for x
   x = 9,249,322,077.79/109,150.90
6. Step 6: Final answer
   x = 84,738.85