Finding the Fourth Proportional to 128,298.72, 177,045.09 and 70,934.72

Step by Step Solution

1. Step 1: Write the proportion equation
   128,298.72 : 177,045.09 = 70,934.72 : x
2. Step 2: Convert to fraction form
   128,298.72/177,045.09 = 70,934.72/x
3. Step 3: Cross multiply
   128,298.72x = 177,045.09 × 70,934.72
4. Step 4: Simplify right side
   128,298.72x = 12,558,643,001.30
5. Step 5: Solve for x
   x = 12,558,643,001.30/128,298.72
6. Step 6: Final answer
   x = 97,885.96