Finding the Fourth Proportional to 42,662.16, 64,005.54 and 13,084.35

Step by Step Solution

1. Step 1: Write the proportion equation
   42,662.16 : 64,005.54 = 13,084.35 : x
2. Step 2: Convert to fraction form
   42,662.16/64,005.54 = 13,084.35/x
3. Step 3: Cross multiply
   42,662.16x = 64,005.54 × 13,084.35
4. Step 4: Simplify right side
   42,662.16x = 837,470,887.30
5. Step 5: Solve for x
   x = 837,470,887.30/42,662.16
6. Step 6: Final answer
   x = 19,630.30