Finding the Fourth Proportional to 42,662.17, 64,002.58 and 13,082.31

Step by Step Solution

1. Step 1: Write the proportion equation
   42,662.17 : 64,002.58 = 13,082.31 : x
2. Step 2: Convert to fraction form
   42,662.17/64,002.58 = 13,082.31/x
3. Step 3: Cross multiply
   42,662.17x = 64,002.58 × 13,082.31
4. Step 4: Simplify right side
   42,662.17x = 837,301,272.35
5. Step 5: Solve for x
   x = 837,301,272.35/42,662.17
6. Step 6: Final answer
   x = 19,626.32