Finding the Fourth Proportional to 42,929.75, 64,405.56 and 13,347.83

Step by Step Solution

1. Step 1: Write the proportion equation
   42,929.75 : 64,405.56 = 13,347.83 : x
2. Step 2: Convert to fraction form
   42,929.75/64,405.56 = 13,347.83/x
3. Step 3: Cross multiply
   42,929.75x = 64,405.56 × 13,347.83
4. Step 4: Simplify right side
   42,929.75x = 859,674,143.91
5. Step 5: Solve for x
   x = 859,674,143.91/42,929.75
6. Step 6: Final answer
   x = 20,025.14