Finding the Fourth Proportional to 221,081.98, 305,006.52 and 136,051.42

Step by Step Solution

1. Step 1: Write the proportion equation
   221,081.98 : 305,006.52 = 136,051.42 : x
2. Step 2: Convert to fraction form
   221,081.98/305,006.52 = 136,051.42/x
3. Step 3: Cross multiply
   221,081.98x = 305,006.52 × 136,051.42
4. Step 4: Simplify right side
   221,081.98x = 41,496,569,902.93
5. Step 5: Solve for x
   x = 41,496,569,902.93/221,081.98
6. Step 6: Final answer
   x = 187,697.66