Finding the Fourth Proportional to 42,680.01, 64,051.55 and 20,506.23

Step by Step Solution

1. Step 1: Write the proportion equation
   42,680.01 : 64,051.55 = 20,506.23 : x
2. Step 2: Convert to fraction form
   42,680.01/64,051.55 = 20,506.23/x
3. Step 3: Cross multiply
   42,680.01x = 64,051.55 × 20,506.23
4. Step 4: Simplify right side
   42,680.01x = 1,313,455,713.63
5. Step 5: Solve for x
   x = 1,313,455,713.63/42,680.01
6. Step 6: Final answer
   x = 30,774.49