Finding the Fourth Proportional to 10,641.82, 15,875.69 and 9,886.70

Step by Step Solution

1. Step 1: Write the proportion equation
   10,641.82 : 15,875.69 = 9,886.70 : x
2. Step 2: Convert to fraction form
   10,641.82/15,875.69 = 9,886.70/x
3. Step 3: Cross multiply
   10,641.82x = 15,875.69 × 9,886.70
4. Step 4: Simplify right side
   10,641.82x = 156,958,184.32
5. Step 5: Solve for x
   x = 156,958,184.32/10,641.82
6. Step 6: Final answer
   x = 14,749.19