Finding the Fourth Proportional to 42,975.78, 64,452.69 and 28,927.86

Step by Step Solution

1. Step 1: Write the proportion equation
   42,975.78 : 64,452.69 = 28,927.86 : x
2. Step 2: Convert to fraction form
   42,975.78/64,452.69 = 28,927.86/x
3. Step 3: Cross multiply
   42,975.78x = 64,452.69 × 28,927.86
4. Step 4: Simplify right side
   42,975.78x = 1,864,478,392.94
5. Step 5: Solve for x
   x = 1,864,478,392.94/42,975.78
6. Step 6: Final answer
   x = 43,384.40