Finding the Fourth Proportional to 9,019.93, 13,528.70 and 2,780.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,019.93 : 13,528.70 = 2,780.15 : x
2. Step 2: Convert to fraction form
   9,019.93/13,528.70 = 2,780.15/x
3. Step 3: Cross multiply
   9,019.93x = 13,528.70 × 2,780.15
4. Step 4: Simplify right side
   9,019.93x = 37,611,815.31
5. Step 5: Solve for x
   x = 37,611,815.31/9,019.93
6. Step 6: Final answer
   x = 4,169.86