Finding the Fourth Proportional to 128,309.06, 177,062.83 and 70,947.38

Step by Step Solution

1. Step 1: Write the proportion equation
   128,309.06 : 177,062.83 = 70,947.38 : x
2. Step 2: Convert to fraction form
   128,309.06/177,062.83 = 70,947.38/x
3. Step 3: Cross multiply
   128,309.06x = 177,062.83 × 70,947.38
4. Step 4: Simplify right side
   128,309.06x = 12,562,144,149.17
5. Step 5: Solve for x
   x = 12,562,144,149.17/128,309.06
6. Step 6: Final answer
   x = 97,905.35