Finding the Fourth Proportional to 275,484.01, 380,138.72 and 154,638.59

Step by Step Solution

1. Step 1: Write the proportion equation
   275,484.01 : 380,138.72 = 154,638.59 : x
2. Step 2: Convert to fraction form
   275,484.01/380,138.72 = 154,638.59/x
3. Step 3: Cross multiply
   275,484.01x = 380,138.72 × 154,638.59
4. Step 4: Simplify right side
   275,484.01x = 58,784,115,665.20
5. Step 5: Solve for x
   x = 58,784,115,665.20/275,484.01
6. Step 6: Final answer
   x = 213,384.86