Finding the Fourth Proportional to 42,626.34, 63,978.93 and 21,581.16

Step by Step Solution

1. Step 1: Write the proportion equation
   42,626.34 : 63,978.93 = 21,581.16 : x
2. Step 2: Convert to fraction form
   42,626.34/63,978.93 = 21,581.16/x
3. Step 3: Cross multiply
   42,626.34x = 63,978.93 × 21,581.16
4. Step 4: Simplify right side
   42,626.34x = 1,380,739,524.96
5. Step 5: Solve for x
   x = 1,380,739,524.96/42,626.34
6. Step 6: Final answer
   x = 32,391.70