Finding the Fourth Proportional to 117,999.21, 162,838.27 and 64,284.10

Step by Step Solution

1. Step 1: Write the proportion equation
   117,999.21 : 162,838.27 = 64,284.10 : x
2. Step 2: Convert to fraction form
   117,999.21/162,838.27 = 64,284.10/x
3. Step 3: Cross multiply
   117,999.21x = 162,838.27 × 64,284.10
4. Step 4: Simplify right side
   117,999.21x = 10,467,911,632.51
5. Step 5: Solve for x
   x = 10,467,911,632.51/117,999.21
6. Step 6: Final answer
   x = 88,711.71