Finding the Fourth Proportional to 34,485.30, 51,714.72 and 13,422.60

Step by Step Solution

1. Step 1: Write the proportion equation
   34,485.30 : 51,714.72 = 13,422.60 : x
2. Step 2: Convert to fraction form
   34,485.30/51,714.72 = 13,422.60/x
3. Step 3: Cross multiply
   34,485.30x = 51,714.72 × 13,422.60
4. Step 4: Simplify right side
   34,485.30x = 694,146,000.67
5. Step 5: Solve for x
   x = 694,146,000.67/34,485.30
6. Step 6: Final answer
   x = 20,128.75