Finding the Fourth Proportional to 42,680.79, 64,066.28 and 23,976.81

Step by Step Solution

1. Step 1: Write the proportion equation
   42,680.79 : 64,066.28 = 23,976.81 : x
2. Step 2: Convert to fraction form
   42,680.79/64,066.28 = 23,976.81/x
3. Step 3: Cross multiply
   42,680.79x = 64,066.28 × 23,976.81
4. Step 4: Simplify right side
   42,680.79x = 1,536,104,903.08
5. Step 5: Solve for x
   x = 1,536,104,903.08/42,680.79
6. Step 6: Final answer
   x = 35,990.55