Finding the Fourth Proportional to 213,924.72, 295,123.41 and 128,994.60

Step by Step Solution

1. Step 1: Write the proportion equation
   213,924.72 : 295,123.41 = 128,994.60 : x
2. Step 2: Convert to fraction form
   213,924.72/295,123.41 = 128,994.60/x
3. Step 3: Cross multiply
   213,924.72x = 295,123.41 × 128,994.60
4. Step 4: Simplify right side
   213,924.72x = 38,069,326,223.59
5. Step 5: Solve for x
   x = 38,069,326,223.59/213,924.72
6. Step 6: Final answer
   x = 177,956.65