Finding the Fourth Proportional to 42,642.18, 63,990.95 and 19,268.82

Step by Step Solution

1. Step 1: Write the proportion equation
   42,642.18 : 63,990.95 = 19,268.82 : x
2. Step 2: Convert to fraction form
   42,642.18/63,990.95 = 19,268.82/x
3. Step 3: Cross multiply
   42,642.18x = 63,990.95 × 19,268.82
4. Step 4: Simplify right side
   42,642.18x = 1,233,030,000.83
5. Step 5: Solve for x
   x = 1,233,030,000.83/42,642.18
6. Step 6: Final answer
   x = 28,915.74