Finding the Fourth Proportional to 84,323.63, 126,474.48 and 39,978.56

Step by Step Solution

1. Step 1: Write the proportion equation
   84,323.63 : 126,474.48 = 39,978.56 : x
2. Step 2: Convert to fraction form
   84,323.63/126,474.48 = 39,978.56/x
3. Step 3: Cross multiply
   84,323.63x = 126,474.48 × 39,978.56
4. Step 4: Simplify right side
   84,323.63x = 5,056,267,903.34
5. Step 5: Solve for x
   x = 5,056,267,903.34/84,323.63
6. Step 6: Final answer
   x = 59,962.64