Finding the Fourth Proportional to 18,621.42, 25,697.25 and 10,123.76

Step by Step Solution

1. Step 1: Write the proportion equation
   18,621.42 : 25,697.25 = 10,123.76 : x
2. Step 2: Convert to fraction form
   18,621.42/25,697.25 = 10,123.76/x
3. Step 3: Cross multiply
   18,621.42x = 25,697.25 × 10,123.76
4. Step 4: Simplify right side
   18,621.42x = 260,152,663.17
5. Step 5: Solve for x
   x = 260,152,663.17/18,621.42
6. Step 6: Final answer
   x = 13,970.61