Finding the Fourth Proportional to 42,862.22, 64,308.72 and 19,167.74

Step by Step Solution

1. Step 1: Write the proportion equation
   42,862.22 : 64,308.72 = 19,167.74 : x
2. Step 2: Convert to fraction form
   42,862.22/64,308.72 = 19,167.74/x
3. Step 3: Cross multiply
   42,862.22x = 64,308.72 × 19,167.74
4. Step 4: Simplify right side
   42,862.22x = 1,232,652,824.69
5. Step 5: Solve for x
   x = 1,232,652,824.69/42,862.22
6. Step 6: Final answer
   x = 28,758.49