Finding the Fourth Proportional to 34,061.72, 46,978.54 and 22,128.90

Step by Step Solution

1. Step 1: Write the proportion equation
   34,061.72 : 46,978.54 = 22,128.90 : x
2. Step 2: Convert to fraction form
   34,061.72/46,978.54 = 22,128.90/x
3. Step 3: Cross multiply
   34,061.72x = 46,978.54 × 22,128.90
4. Step 4: Simplify right side
   34,061.72x = 1,039,583,182.31
5. Step 5: Solve for x
   x = 1,039,583,182.31/34,061.72
6. Step 6: Final answer
   x = 30,520.58