Finding the Fourth Proportional to 93,005.33, 128,409.17 and 71,456.69

Step by Step Solution

1. Step 1: Write the proportion equation
   93,005.33 : 128,409.17 = 71,456.69 : x
2. Step 2: Convert to fraction form
   93,005.33/128,409.17 = 71,456.69/x
3. Step 3: Cross multiply
   93,005.33x = 128,409.17 × 71,456.69
4. Step 4: Simplify right side
   93,005.33x = 9,175,693,896.56
5. Step 5: Solve for x
   x = 9,175,693,896.56/93,005.33
6. Step 6: Final answer
   x = 98,657.72