Finding the Fourth Proportional to 19,642.93, 29,451.72 and 8,405.61

Step by Step Solution

1. Step 1: Write the proportion equation
   19,642.93 : 29,451.72 = 8,405.61 : x
2. Step 2: Convert to fraction form
   19,642.93/29,451.72 = 8,405.61/x
3. Step 3: Cross multiply
   19,642.93x = 29,451.72 × 8,405.61
4. Step 4: Simplify right side
   19,642.93x = 247,559,672.15
5. Step 5: Solve for x
   x = 247,559,672.15/19,642.93
6. Step 6: Final answer
   x = 12,602.99