Finding the Fourth Proportional to 42,682.96, 64,022.01 and 13,100.75

Step by Step Solution

1. Step 1: Write the proportion equation
   42,682.96 : 64,022.01 = 13,100.75 : x
2. Step 2: Convert to fraction form
   42,682.96/64,022.01 = 13,100.75/x
3. Step 3: Cross multiply
   42,682.96x = 64,022.01 × 13,100.75
4. Step 4: Simplify right side
   42,682.96x = 838,736,347.51
5. Step 5: Solve for x
   x = 838,736,347.51/42,682.96
6. Step 6: Final answer
   x = 19,650.38