Finding the Fourth Proportional to 30,948.06, 42,718.05 and 19,770.06

Step by Step Solution

1. Step 1: Write the proportion equation
   30,948.06 : 42,718.05 = 19,770.06 : x
2. Step 2: Convert to fraction form
   30,948.06/42,718.05 = 19,770.06/x
3. Step 3: Cross multiply
   30,948.06x = 42,718.05 × 19,770.06
4. Step 4: Simplify right side
   30,948.06x = 844,538,411.58
5. Step 5: Solve for x
   x = 844,538,411.58/30,948.06
6. Step 6: Final answer
   x = 27,288.90