Finding the Fourth Proportional to 91,100.70, 136,651.05 and 79,436.70

Step by Step Solution

1. Step 1: Write the proportion equation
   91,100.70 : 136,651.05 = 79,436.70 : x
2. Step 2: Convert to fraction form
   91,100.70/136,651.05 = 79,436.70/x
3. Step 3: Cross multiply
   91,100.70x = 136,651.05 × 79,436.70
4. Step 4: Simplify right side
   91,100.70x = 10,855,108,463.54
5. Step 5: Solve for x
   x = 10,855,108,463.54/91,100.70
6. Step 6: Final answer
   x = 119,155.05