Finding the Fourth Proportional to 13,925.32, 19,216.90 and 7,638.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,925.32 : 19,216.90 = 7,638.10 : x
2. Step 2: Convert to fraction form
   13,925.32/19,216.90 = 7,638.10/x
3. Step 3: Cross multiply
   13,925.32x = 19,216.90 × 7,638.10
4. Step 4: Simplify right side
   13,925.32x = 146,780,603.89
5. Step 5: Solve for x
   x = 146,780,603.89/13,925.32
6. Step 6: Final answer
   x = 10,540.56