Finding the Fourth Proportional to 190,667.82, 285,889.60 and 72,347.48

Step by Step Solution

1. Step 1: Write the proportion equation
   190,667.82 : 285,889.60 = 72,347.48 : x
2. Step 2: Convert to fraction form
   190,667.82/285,889.60 = 72,347.48/x
3. Step 3: Cross multiply
   190,667.82x = 285,889.60 × 72,347.48
4. Step 4: Simplify right side
   190,667.82x = 20,683,391,851.28
5. Step 5: Solve for x
   x = 20,683,391,851.28/190,667.82
6. Step 6: Final answer
   x = 108,478.67