Finding the Fourth Proportional to 83,015.31, 124,572.38 and 30,428.49

Step by Step Solution

1. Step 1: Write the proportion equation
   83,015.31 : 124,572.38 = 30,428.49 : x
2. Step 2: Convert to fraction form
   83,015.31/124,572.38 = 30,428.49/x
3. Step 3: Cross multiply
   83,015.31x = 124,572.38 × 30,428.49
4. Step 4: Simplify right side
   83,015.31x = 3,790,549,266.96
5. Step 5: Solve for x
   x = 3,790,549,266.96/83,015.31
6. Step 6: Final answer
   x = 45,660.85