Finding the Fourth Proportional to 22,779.34, 31,435.59 and 12,707.60

Step by Step Solution

1. Step 1: Write the proportion equation
   22,779.34 : 31,435.59 = 12,707.60 : x
2. Step 2: Convert to fraction form
   22,779.34/31,435.59 = 12,707.60/x
3. Step 3: Cross multiply
   22,779.34x = 31,435.59 × 12,707.60
4. Step 4: Simplify right side
   22,779.34x = 399,470,970.78
5. Step 5: Solve for x
   x = 399,470,970.78/22,779.34
6. Step 6: Final answer
   x = 17,536.54