Finding the Fourth Proportional to 201,820.91, 278,498.47 and 120,144.83

Step by Step Solution

1. Step 1: Write the proportion equation
   201,820.91 : 278,498.47 = 120,144.83 : x
2. Step 2: Convert to fraction form
   201,820.91/278,498.47 = 120,144.83/x
3. Step 3: Cross multiply
   201,820.91x = 278,498.47 × 120,144.83
4. Step 4: Simplify right side
   201,820.91x = 33,460,151,333.41
5. Step 5: Solve for x
   x = 33,460,151,333.41/201,820.91
6. Step 6: Final answer
   x = 165,791.30