Finding the Fourth Proportional to 42,807.66, 64,184.16 and 20,576.82

Step by Step Solution

1. Step 1: Write the proportion equation
   42,807.66 : 64,184.16 = 20,576.82 : x
2. Step 2: Convert to fraction form
   42,807.66/64,184.16 = 20,576.82/x
3. Step 3: Cross multiply
   42,807.66x = 64,184.16 × 20,576.82
4. Step 4: Simplify right side
   42,807.66x = 1,320,705,907.17
5. Step 5: Solve for x
   x = 1,320,705,907.17/42,807.66
6. Step 6: Final answer
   x = 30,852.09