Finding the Fourth Proportional to 42,781.23, 64,181.00 and 12,797.82

Step by Step Solution

1. Step 1: Write the proportion equation
   42,781.23 : 64,181.00 = 12,797.82 : x
2. Step 2: Convert to fraction form
   42,781.23/64,181.00 = 12,797.82/x
3. Step 3: Cross multiply
   42,781.23x = 64,181.00 × 12,797.82
4. Step 4: Simplify right side
   42,781.23x = 821,376,821.43
5. Step 5: Solve for x
   x = 821,376,821.43/42,781.23
6. Step 6: Final answer
   x = 19,199.47