Finding the Fourth Proportional to 35,066.56, 48,405.28 and 21,640

Step by Step Solution

1. Step 1: Write the proportion equation
   35,066.56 : 48,405.28 = 21,640 : x
2. Step 2: Convert to fraction form
   35,066.56/48,405.28 = 21,640/x
3. Step 3: Cross multiply
   35,066.56x = 48,405.28 × 21,640
4. Step 4: Simplify right side
   35,066.56x = 1,047,490,259.20
5. Step 5: Solve for x
   x = 1,047,490,259.20/35,066.56
6. Step 6: Final answer
   x = 29,871.49