Finding the Fourth Proportional to 108,693.21, 149,868.59 and 100,632.09

Step by Step Solution

1. Step 1: Write the proportion equation
   108,693.21 : 149,868.59 = 100,632.09 : x
2. Step 2: Convert to fraction form
   108,693.21/149,868.59 = 100,632.09/x
3. Step 3: Cross multiply
   108,693.21x = 149,868.59 × 100,632.09
4. Step 4: Simplify right side
   108,693.21x = 15,081,588,933.89
5. Step 5: Solve for x
   x = 15,081,588,933.89/108,693.21
6. Step 6: Final answer
   x = 138,753.74