Finding the Fourth Proportional to 103,665.36, 143,003.33 and 71,343.86

Step by Step Solution

1. Step 1: Write the proportion equation
   103,665.36 : 143,003.33 = 71,343.86 : x
2. Step 2: Convert to fraction form
   103,665.36/143,003.33 = 71,343.86/x
3. Step 3: Cross multiply
   103,665.36x = 143,003.33 × 71,343.86
4. Step 4: Simplify right side
   103,665.36x = 10,202,409,756.79
5. Step 5: Solve for x
   x = 10,202,409,756.79/103,665.36
6. Step 6: Final answer
   x = 98,416.77