Finding the Fourth Proportional to 109,643.69, 151,443.25 and 79,381.08

Step by Step Solution

1. Step 1: Write the proportion equation
   109,643.69 : 151,443.25 = 79,381.08 : x
2. Step 2: Convert to fraction form
   109,643.69/151,443.25 = 79,381.08/x
3. Step 3: Cross multiply
   109,643.69x = 151,443.25 × 79,381.08
4. Step 4: Simplify right side
   109,643.69x = 12,021,728,545.26
5. Step 5: Solve for x
   x = 12,021,728,545.26/109,643.69
6. Step 6: Final answer
   x = 109,643.59