Finding the Fourth Proportional to 109,399.39, 149,986.60 and 107,406.58

Step by Step Solution

1. Step 1: Write the proportion equation
   109,399.39 : 149,986.60 = 107,406.58 : x
2. Step 2: Convert to fraction form
   109,399.39/149,986.60 = 107,406.58/x
3. Step 3: Cross multiply
   109,399.39x = 149,986.60 × 107,406.58
4. Step 4: Simplify right side
   109,399.39x = 16,109,547,751.83
5. Step 5: Solve for x
   x = 16,109,547,751.83/109,399.39
6. Step 6: Final answer
   x = 147,254.46