Finding the Fourth Proportional to 45,678.05, 68,471.72 and 21,980.69

Step by Step Solution

1. Step 1: Write the proportion equation
   45,678.05 : 68,471.72 = 21,980.69 : x
2. Step 2: Convert to fraction form
   45,678.05/68,471.72 = 21,980.69/x
3. Step 3: Cross multiply
   45,678.05x = 68,471.72 × 21,980.69
4. Step 4: Simplify right side
   45,678.05x = 1,505,055,541.18
5. Step 5: Solve for x
   x = 1,505,055,541.18/45,678.05
6. Step 6: Final answer
   x = 32,949.21