Finding the Fourth Proportional to 25,235.47, 37,886.69 and 21,561.31

Step by Step Solution

1. Step 1: Write the proportion equation
   25,235.47 : 37,886.69 = 21,561.31 : x
2. Step 2: Convert to fraction form
   25,235.47/37,886.69 = 21,561.31/x
3. Step 3: Cross multiply
   25,235.47x = 37,886.69 × 21,561.31
4. Step 4: Simplify right side
   25,235.47x = 816,886,667.96
5. Step 5: Solve for x
   x = 816,886,667.96/25,235.47
6. Step 6: Final answer
   x = 32,370.57