Finding the Fourth Proportional to 136,945,145.35, 188,874,106.17 and 120,389,872.45

Step by Step Solution

1. Step 1: Write the proportion equation
   136,945,145.35 : 188,874,106.17 = 120,389,872.45 : x
2. Step 2: Convert to fraction form
   136,945,145.35/188,874,106.17 = 120,389,872.45/x
3. Step 3: Cross multiply
   136,945,145.35x = 188,874,106.17 × 120,389,872.45
4. Step 4: Simplify right side
   136,945,145.35x = 22,738,529,550,914,056
5. Step 5: Solve for x
   x = 22,738,529,550,914,056/136,945,145.35
6. Step 6: Final answer
   x = 166,041,150.95