Finding the Fourth Proportional to 107,628.72, 148,443.48 and 69,915.12

Step by Step Solution

1. Step 1: Write the proportion equation
   107,628.72 : 148,443.48 = 69,915.12 : x
2. Step 2: Convert to fraction form
   107,628.72/148,443.48 = 69,915.12/x
3. Step 3: Cross multiply
   107,628.72x = 148,443.48 × 69,915.12
4. Step 4: Simplify right side
   107,628.72x = 10,378,443,717.42
5. Step 5: Solve for x
   x = 10,378,443,717.42/107,628.72
6. Step 6: Final answer
   x = 96,428.20