Finding the Fourth Proportional to 42,773.57, 64,168.88 and 13,190.27

Step by Step Solution

1. Step 1: Write the proportion equation
   42,773.57 : 64,168.88 = 13,190.27 : x
2. Step 2: Convert to fraction form
   42,773.57/64,168.88 = 13,190.27/x
3. Step 3: Cross multiply
   42,773.57x = 64,168.88 × 13,190.27
4. Step 4: Simplify right side
   42,773.57x = 846,404,466.00
5. Step 5: Solve for x
   x = 846,404,466.00/42,773.57
6. Step 6: Final answer
   x = 19,788.03