Finding the Fourth Proportional to 15,870.87, 21,894.74 and 10,204.58

Step by Step Solution

1. Step 1: Write the proportion equation
   15,870.87 : 21,894.74 = 10,204.58 : x
2. Step 2: Convert to fraction form
   15,870.87/21,894.74 = 10,204.58/x
3. Step 3: Cross multiply
   15,870.87x = 21,894.74 × 10,204.58
4. Step 4: Simplify right side
   15,870.87x = 223,426,667.89
5. Step 5: Solve for x
   x = 223,426,667.89/15,870.87
6. Step 6: Final answer
   x = 14,077.78