Finding the Fourth Proportional to 42,962.17, 64,434.91 and 21,609.19

Step by Step Solution

1. Step 1: Write the proportion equation
   42,962.17 : 64,434.91 = 21,609.19 : x
2. Step 2: Convert to fraction form
   42,962.17/64,434.91 = 21,609.19/x
3. Step 3: Cross multiply
   42,962.17x = 64,434.91 × 21,609.19
4. Step 4: Simplify right side
   42,962.17x = 1,392,386,484.43
5. Step 5: Solve for x
   x = 1,392,386,484.43/42,962.17
6. Step 6: Final answer
   x = 32,409.59