Finding the Fourth Proportional to 99,196.74, 136,944.81 and 76,485.96

Step by Step Solution

1. Step 1: Write the proportion equation
   99,196.74 : 136,944.81 = 76,485.96 : x
2. Step 2: Convert to fraction form
   99,196.74/136,944.81 = 76,485.96/x
3. Step 3: Cross multiply
   99,196.74x = 136,944.81 × 76,485.96
4. Step 4: Simplify right side
   99,196.74x = 10,474,355,259.87
5. Step 5: Solve for x
   x = 10,474,355,259.87/99,196.74
6. Step 6: Final answer
   x = 105,591.73