Finding the Fourth Proportional to 42,962.83, 64,435.91 and 21,609.86

Step by Step Solution

1. Step 1: Write the proportion equation
   42,962.83 : 64,435.91 = 21,609.86 : x
2. Step 2: Convert to fraction form
   42,962.83/64,435.91 = 21,609.86/x
3. Step 3: Cross multiply
   42,962.83x = 64,435.91 × 21,609.86
4. Step 4: Simplify right side
   42,962.83x = 1,392,450,725.18
5. Step 5: Solve for x
   x = 1,392,450,725.18/42,962.83
6. Step 6: Final answer
   x = 32,410.59