Finding the Fourth Proportional to 38,686.10, 58,010.00 and 12,387.42

Step by Step Solution

1. Step 1: Write the proportion equation
   38,686.10 : 58,010.00 = 12,387.42 : x
2. Step 2: Convert to fraction form
   38,686.10/58,010.00 = 12,387.42/x
3. Step 3: Cross multiply
   38,686.10x = 58,010.00 × 12,387.42
4. Step 4: Simplify right side
   38,686.10x = 718,594,172.26
5. Step 5: Solve for x
   x = 718,594,172.26/38,686.10
6. Step 6: Final answer
   x = 18,575.00