Finding the Fourth Proportional to 137,172.84, 188,877.72 and 120,081.42

Step by Step Solution

1. Step 1: Write the proportion equation
   137,172.84 : 188,877.72 = 120,081.42 : x
2. Step 2: Convert to fraction form
   137,172.84/188,877.72 = 120,081.42/x
3. Step 3: Cross multiply
   137,172.84x = 188,877.72 × 120,081.42
4. Step 4: Simplify right side
   137,172.84x = 22,680,704,823.96
5. Step 5: Solve for x
   x = 22,680,704,823.96/137,172.84
6. Step 6: Final answer
   x = 165,343.99