Finding the Fourth Proportional to 10,012.30, 14,986.05 and 7,809.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,012.30 : 14,986.05 = 7,809.10 : x
2. Step 2: Convert to fraction form
   10,012.30/14,986.05 = 7,809.10/x
3. Step 3: Cross multiply
   10,012.30x = 14,986.05 × 7,809.10
4. Step 4: Simplify right side
   10,012.30x = 117,027,563.06
5. Step 5: Solve for x
   x = 117,027,563.06/10,012.30
6. Step 6: Final answer
   x = 11,688.38