Finding the Fourth Proportional to 22,018.69, 30,385.80 and 12,587.45

Step by Step Solution

1. Step 1: Write the proportion equation
   22,018.69 : 30,385.80 = 12,587.45 : x
2. Step 2: Convert to fraction form
   22,018.69/30,385.80 = 12,587.45/x
3. Step 3: Cross multiply
   22,018.69x = 30,385.80 × 12,587.45
4. Step 4: Simplify right side
   22,018.69x = 382,479,814.17
5. Step 5: Solve for x
   x = 382,479,814.17/22,018.69
6. Step 6: Final answer
   x = 17,370.69