Finding the Fourth Proportional to 129,003.33, 178,018.56 and 71,646.36

Step by Step Solution

1. Step 1: Write the proportion equation
   129,003.33 : 178,018.56 = 71,646.36 : x
2. Step 2: Convert to fraction form
   129,003.33/178,018.56 = 71,646.36/x
3. Step 3: Cross multiply
   129,003.33x = 178,018.56 × 71,646.36
4. Step 4: Simplify right side
   129,003.33x = 12,754,381,168.87
5. Step 5: Solve for x
   x = 12,754,381,168.87/129,003.33
6. Step 6: Final answer
   x = 98,868.62