Finding the Fourth Proportional to 21,431.55, 32,126.06 and 10,870.16

Step by Step Solution

1. Step 1: Write the proportion equation
   21,431.55 : 32,126.06 = 10,870.16 : x
2. Step 2: Convert to fraction form
   21,431.55/32,126.06 = 10,870.16/x
3. Step 3: Cross multiply
   21,431.55x = 32,126.06 × 10,870.16
4. Step 4: Simplify right side
   21,431.55x = 349,215,412.37
5. Step 5: Solve for x
   x = 349,215,412.37/21,431.55
6. Step 6: Final answer
   x = 16,294.45