Finding the Fourth Proportional to 42,704.82, 64,068.98 and 20,536.74

Step by Step Solution

1. Step 1: Write the proportion equation
   42,704.82 : 64,068.98 = 20,536.74 : x
2. Step 2: Convert to fraction form
   42,704.82/64,068.98 = 20,536.74/x
3. Step 3: Cross multiply
   42,704.82x = 64,068.98 × 20,536.74
4. Step 4: Simplify right side
   42,704.82x = 1,315,767,881.64
5. Step 5: Solve for x
   x = 1,315,767,881.64/42,704.82
6. Step 6: Final answer
   x = 30,810.76