Finding the Fourth Proportional to 56,822.52, 78,353.54 and 38,685

Step by Step Solution

1. Step 1: Write the proportion equation
   56,822.52 : 78,353.54 = 38,685 : x
2. Step 2: Convert to fraction form
   56,822.52/78,353.54 = 38,685/x
3. Step 3: Cross multiply
   56,822.52x = 78,353.54 × 38,685
4. Step 4: Simplify right side
   56,822.52x = 3,031,106,694.90
5. Step 5: Solve for x
   x = 3,031,106,694.90/56,822.52
6. Step 6: Final answer
   x = 53,343.40