Finding the Fourth Proportional to 42,997.68, 64,147.32 and 40,672.53

Step by Step Solution

1. Step 1: Write the proportion equation
   42,997.68 : 64,147.32 = 40,672.53 : x
2. Step 2: Convert to fraction form
   42,997.68/64,147.32 = 40,672.53/x
3. Step 3: Cross multiply
   42,997.68x = 64,147.32 × 40,672.53
4. Step 4: Simplify right side
   42,997.68x = 2,609,033,797.12
5. Step 5: Solve for x
   x = 2,609,033,797.12/42,997.68
6. Step 6: Final answer
   x = 60,678.48