Finding the Fourth Proportional to 42,657.16, 64,007.34 and 28,777

Step by Step Solution

1. Step 1: Write the proportion equation
   42,657.16 : 64,007.34 = 28,777 : x
2. Step 2: Convert to fraction form
   42,657.16/64,007.34 = 28,777/x
3. Step 3: Cross multiply
   42,657.16x = 64,007.34 × 28,777
4. Step 4: Simplify right side
   42,657.16x = 1,841,939,223.18
5. Step 5: Solve for x
   x = 1,841,939,223.18/42,657.16
6. Step 6: Final answer
   x = 43,180.07