Finding the Fourth Proportional to 12,300.17, 18,434.67 and 7,856.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,300.17 : 18,434.67 = 7,856.12 : x
2. Step 2: Convert to fraction form
   12,300.17/18,434.67 = 7,856.12/x
3. Step 3: Cross multiply
   12,300.17x = 18,434.67 × 7,856.12
4. Step 4: Simplify right side
   12,300.17x = 144,824,996.31
5. Step 5: Solve for x
   x = 144,824,996.31/12,300.17
6. Step 6: Final answer
   x = 11,774.23