Finding the Fourth Proportional to 42,767.30, 64,112.06 and 19,380.98

Step by Step Solution

1. Step 1: Write the proportion equation
   42,767.30 : 64,112.06 = 19,380.98 : x
2. Step 2: Convert to fraction form
   42,767.30/64,112.06 = 19,380.98/x
3. Step 3: Cross multiply
   42,767.30x = 64,112.06 × 19,380.98
4. Step 4: Simplify right side
   42,767.30x = 1,242,554,552.62
5. Step 5: Solve for x
   x = 1,242,554,552.62/42,767.30
6. Step 6: Final answer
   x = 29,053.85