Finding the Fourth Proportional to 118,402.56, 163,396.98 and 64,688.22

Step by Step Solution

1. Step 1: Write the proportion equation
   118,402.56 : 163,396.98 = 64,688.22 : x
2. Step 2: Convert to fraction form
   118,402.56/163,396.98 = 64,688.22/x
3. Step 3: Cross multiply
   118,402.56x = 163,396.98 × 64,688.22
4. Step 4: Simplify right side
   118,402.56x = 10,569,859,789.58
5. Step 5: Solve for x
   x = 10,569,859,789.58/118,402.56
6. Step 6: Final answer
   x = 89,270.53