Finding the Fourth Proportional to 9,886.06, 14,830.20 and 3,312.70

Step by Step Solution

1. Step 1: Write the proportion equation
   9,886.06 : 14,830.20 = 3,312.70 : x
2. Step 2: Convert to fraction form
   9,886.06/14,830.20 = 3,312.70/x
3. Step 3: Cross multiply
   9,886.06x = 14,830.20 × 3,312.70
4. Step 4: Simplify right side
   9,886.06x = 49,128,003.54
5. Step 5: Solve for x
   x = 49,128,003.54/9,886.06
6. Step 6: Final answer
   x = 4,969.42