Finding the Fourth Proportional to 30,885.06, 42,605.67 and 19,535.40

Step by Step Solution

1. Step 1: Write the proportion equation
   30,885.06 : 42,605.67 = 19,535.40 : x
2. Step 2: Convert to fraction form
   30,885.06/42,605.67 = 19,535.40/x
3. Step 3: Cross multiply
   30,885.06x = 42,605.67 × 19,535.40
4. Step 4: Simplify right side
   30,885.06x = 832,318,805.72
5. Step 5: Solve for x
   x = 832,318,805.72/30,885.06
6. Step 6: Final answer
   x = 26,948.91