Finding the Fourth Proportional to 42,405.05, 63,548.72 and 18,677.01

Step by Step Solution

1. Step 1: Write the proportion equation
   42,405.05 : 63,548.72 = 18,677.01 : x
2. Step 2: Convert to fraction form
   42,405.05/63,548.72 = 18,677.01/x
3. Step 3: Cross multiply
   42,405.05x = 63,548.72 × 18,677.01
4. Step 4: Simplify right side
   42,405.05x = 1,186,899,985.54
5. Step 5: Solve for x
   x = 1,186,899,985.54/42,405.05
6. Step 6: Final answer
   x = 27,989.59