Finding the Fourth Proportional to 12,690.09, 19,036.98 and 3,925.71

Step by Step Solution

1. Step 1: Write the proportion equation
   12,690.09 : 19,036.98 = 3,925.71 : x
2. Step 2: Convert to fraction form
   12,690.09/19,036.98 = 3,925.71/x
3. Step 3: Cross multiply
   12,690.09x = 19,036.98 × 3,925.71
4. Step 4: Simplify right side
   12,690.09x = 74,733,662.76
5. Step 5: Solve for x
   x = 74,733,662.76/12,690.09
6. Step 6: Final answer
   x = 5,889.14