Finding the Fourth Proportional to 118,411.34, 163,405.73 and 64,695.21

Step by Step Solution

1. Step 1: Write the proportion equation
   118,411.34 : 163,405.73 = 64,695.21 : x
2. Step 2: Convert to fraction form
   118,411.34/163,405.73 = 64,695.21/x
3. Step 3: Cross multiply
   118,411.34x = 163,405.73 × 64,695.21
4. Step 4: Simplify right side
   118,411.34x = 10,571,567,384.56
5. Step 5: Solve for x
   x = 10,571,567,384.56/118,411.34
6. Step 6: Final answer
   x = 89,278.33