Finding the Fourth Proportional to 42,908.63, 64,359.74 and 21,835.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,908.63 : 64,359.74 = 21,835.50 : x
2. Step 2: Convert to fraction form
   42,908.63/64,359.74 = 21,835.50/x
3. Step 3: Cross multiply
   42,908.63x = 64,359.74 × 21,835.50
4. Step 4: Simplify right side
   42,908.63x = 1,405,326,993.59
5. Step 5: Solve for x
   x = 1,405,326,993.59/42,908.63
6. Step 6: Final answer
   x = 32,751.62