Finding the Fourth Proportional to 42,927.72, 64,404.96 and 19,255.08

Step by Step Solution

1. Step 1: Write the proportion equation
   42,927.72 : 64,404.96 = 19,255.08 : x
2. Step 2: Convert to fraction form
   42,927.72/64,404.96 = 19,255.08/x
3. Step 3: Cross multiply
   42,927.72x = 64,404.96 × 19,255.08
4. Step 4: Simplify right side
   42,927.72x = 1,240,122,657.20
5. Step 5: Solve for x
   x = 1,240,122,657.20/42,927.72
6. Step 6: Final answer
   x = 28,888.62