Finding the Fourth Proportional to 117,713, 162,443.94 and 64,721

Step by Step Solution

1. Step 1: Write the proportion equation
   117,713 : 162,443.94 = 64,721 : x
2. Step 2: Convert to fraction form
   117,713/162,443.94 = 64,721/x
3. Step 3: Cross multiply
   117,713x = 162,443.94 × 64,721
4. Step 4: Simplify right side
   117,713x = 10,513,534,240.74
5. Step 5: Solve for x
   x = 10,513,534,240.74/117,713
6. Step 6: Final answer
   x = 89,314.98