Finding the Fourth Proportional to 191,669.98, 287,638.38 and 79,350.78

Step by Step Solution

1. Step 1: Write the proportion equation
   191,669.98 : 287,638.38 = 79,350.78 : x
2. Step 2: Convert to fraction form
   191,669.98/287,638.38 = 79,350.78/x
3. Step 3: Cross multiply
   191,669.98x = 287,638.38 × 79,350.78
4. Step 4: Simplify right side
   191,669.98x = 22,824,329,513.37
5. Step 5: Solve for x
   x = 22,824,329,513.37/191,669.98
6. Step 6: Final answer
   x = 119,081.40