Finding the Fourth Proportional to 78,570.84, 108,428.04 and 42,761.28

Step by Step Solution

1. Step 1: Write the proportion equation
   78,570.84 : 108,428.04 = 42,761.28 : x
2. Step 2: Convert to fraction form
   78,570.84/108,428.04 = 42,761.28/x
3. Step 3: Cross multiply
   78,570.84x = 108,428.04 × 42,761.28
4. Step 4: Simplify right side
   78,570.84x = 4,636,521,778.29
5. Step 5: Solve for x
   x = 4,636,521,778.29/78,570.84
6. Step 6: Final answer
   x = 59,010.72