Finding the Fourth Proportional to 128,297.72, 177,043.71 and 70,933.72

Step by Step Solution

1. Step 1: Write the proportion equation
   128,297.72 : 177,043.71 = 70,933.72 : x
2. Step 2: Convert to fraction form
   128,297.72/177,043.71 = 70,933.72/x
3. Step 3: Cross multiply
   128,297.72x = 177,043.71 × 70,933.72
4. Step 4: Simplify right side
   128,297.72x = 12,558,368,598.23
5. Step 5: Solve for x
   x = 12,558,368,598.23/128,297.72
6. Step 6: Final answer
   x = 97,884.59