Finding the Fourth Proportional to 12,100.73, 18,140.16 and 8,404.70

Step by Step Solution

1. Step 1: Write the proportion equation
   12,100.73 : 18,140.16 = 8,404.70 : x
2. Step 2: Convert to fraction form
   12,100.73/18,140.16 = 8,404.70/x
3. Step 3: Cross multiply
   12,100.73x = 18,140.16 × 8,404.70
4. Step 4: Simplify right side
   12,100.73x = 152,462,602.75
5. Step 5: Solve for x
   x = 152,462,602.75/12,100.73
6. Step 6: Final answer
   x = 12,599.45