Finding the Fourth Proportional to 10,056.84, 13,938.72 and 9,870.18

Step by Step Solution

1. Step 1: Write the proportion equation
   10,056.84 : 13,938.72 = 9,870.18 : x
2. Step 2: Convert to fraction form
   10,056.84/13,938.72 = 9,870.18/x
3. Step 3: Cross multiply
   10,056.84x = 13,938.72 × 9,870.18
4. Step 4: Simplify right side
   10,056.84x = 137,577,675.37
5. Step 5: Solve for x
   x = 137,577,675.37/10,056.84
6. Step 6: Final answer
   x = 13,680.01