Finding the Fourth Proportional to 128,300.56, 177,047.59 and 70,936.54

Step by Step Solution

1. Step 1: Write the proportion equation
   128,300.56 : 177,047.59 = 70,936.54 : x
2. Step 2: Convert to fraction form
   128,300.56/177,047.59 = 70,936.54/x
3. Step 3: Cross multiply
   128,300.56x = 177,047.59 × 70,936.54
4. Step 4: Simplify right side
   128,300.56x = 12,559,143,449.94
5. Step 5: Solve for x
   x = 12,559,143,449.94/128,300.56
6. Step 6: Final answer
   x = 97,888.45