Finding the Fourth Proportional to 213,061.08, 294,060.06 and 128,186.04

Step by Step Solution

1. Step 1: Write the proportion equation
   213,061.08 : 294,060.06 = 128,186.04 : x
2. Step 2: Convert to fraction form
   213,061.08/294,060.06 = 128,186.04/x
3. Step 3: Cross multiply
   213,061.08x = 294,060.06 × 128,186.04
4. Step 4: Simplify right side
   213,061.08x = 37,694,394,613.56
5. Step 5: Solve for x
   x = 37,694,394,613.56/213,061.08
6. Step 6: Final answer
   x = 176,918.26