Finding the Fourth Proportional to 339,096.48, 508,664.16 and 89,772

Step by Step Solution

1. Step 1: Write the proportion equation
   339,096.48 : 508,664.16 = 89,772 : x
2. Step 2: Convert to fraction form
   339,096.48/508,664.16 = 89,772/x
3. Step 3: Cross multiply
   339,096.48x = 508,664.16 × 89,772
4. Step 4: Simplify right side
   339,096.48x = 45,663,798,971.52
5. Step 5: Solve for x
   x = 45,663,798,971.52/339,096.48
6. Step 6: Final answer
   x = 134,663.15