Finding the Fourth Proportional to 42,813.08, 64,196.04 and 13,222.76

Step by Step Solution

1. Step 1: Write the proportion equation
   42,813.08 : 64,196.04 = 13,222.76 : x
2. Step 2: Convert to fraction form
   42,813.08/64,196.04 = 13,222.76/x
3. Step 3: Cross multiply
   42,813.08x = 64,196.04 × 13,222.76
4. Step 4: Simplify right side
   42,813.08x = 848,848,829.87
5. Step 5: Solve for x
   x = 848,848,829.87/42,813.08
6. Step 6: Final answer
   x = 19,826.86