Finding the Fourth Proportional to 51,061.67, 70,436.34 and 30,638.45

Step by Step Solution

1. Step 1: Write the proportion equation
   51,061.67 : 70,436.34 = 30,638.45 : x
2. Step 2: Convert to fraction form
   51,061.67/70,436.34 = 30,638.45/x
3. Step 3: Cross multiply
   51,061.67x = 70,436.34 × 30,638.45
4. Step 4: Simplify right side
   51,061.67x = 2,158,060,660.30
5. Step 5: Solve for x
   x = 2,158,060,660.30/51,061.67
6. Step 6: Final answer
   x = 42,263.81