Finding the Fourth Proportional to 42,665.32, 63,997.50 and 19,275.40

Step by Step Solution

1. Step 1: Write the proportion equation
   42,665.32 : 63,997.50 = 19,275.40 : x
2. Step 2: Convert to fraction form
   42,665.32/63,997.50 = 19,275.40/x
3. Step 3: Cross multiply
   42,665.32x = 63,997.50 × 19,275.40
4. Step 4: Simplify right side
   42,665.32x = 1,233,577,411.50
5. Step 5: Solve for x
   x = 1,233,577,411.50/42,665.32
6. Step 6: Final answer
   x = 28,912.88