Finding the Fourth Proportional to 128,273.98, 177,016.89 and 70,914.78

Step by Step Solution

1. Step 1: Write the proportion equation
   128,273.98 : 177,016.89 = 70,914.78 : x
2. Step 2: Convert to fraction form
   128,273.98/177,016.89 = 70,914.78/x
3. Step 3: Cross multiply
   128,273.98x = 177,016.89 × 70,914.78
4. Step 4: Simplify right side
   128,273.98x = 12,553,113,810.63
5. Step 5: Solve for x
   x = 12,553,113,810.63/128,273.98
6. Step 6: Final answer
   x = 97,861.73