Finding the Fourth Proportional to 12,671.10, 17,478.72 and 7,365.06

Step by Step Solution

1. Step 1: Write the proportion equation
   12,671.10 : 17,478.72 = 7,365.06 : x
2. Step 2: Convert to fraction form
   12,671.10/17,478.72 = 7,365.06/x
3. Step 3: Cross multiply
   12,671.10x = 17,478.72 × 7,365.06
4. Step 4: Simplify right side
   12,671.10x = 128,731,821.52
5. Step 5: Solve for x
   x = 128,731,821.52/12,671.10
6. Step 6: Final answer
   x = 10,159.48