Finding the Fourth Proportional to 109,428.48, 164,259.36 and 105,462.72

Step by Step Solution

1. Step 1: Write the proportion equation
   109,428.48 : 164,259.36 = 105,462.72 : x
2. Step 2: Convert to fraction form
   109,428.48/164,259.36 = 105,462.72/x
3. Step 3: Cross multiply
   109,428.48x = 164,259.36 × 105,462.72
4. Step 4: Simplify right side
   109,428.48x = 17,323,238,891.06
5. Step 5: Solve for x
   x = 17,323,238,891.06/109,428.48
6. Step 6: Final answer
   x = 158,306.49