Finding the Fourth Proportional to 42,997.60, 64,538.16 and 40,630.96

Step by Step Solution

1. Step 1: Write the proportion equation
   42,997.60 : 64,538.16 = 40,630.96 : x
2. Step 2: Convert to fraction form
   42,997.60/64,538.16 = 40,630.96/x
3. Step 3: Cross multiply
   42,997.60x = 64,538.16 × 40,630.96
4. Step 4: Simplify right side
   42,997.60x = 2,622,247,397.43
5. Step 5: Solve for x
   x = 2,622,247,397.43/42,997.60
6. Step 6: Final answer
   x = 60,985.90