Finding the Fourth Proportional to 118,669.45, 163,764.05 and 64,957.87

Step by Step Solution

1. Step 1: Write the proportion equation
   118,669.45 : 163,764.05 = 64,957.87 : x
2. Step 2: Convert to fraction form
   118,669.45/163,764.05 = 64,957.87/x
3. Step 3: Cross multiply
   118,669.45x = 163,764.05 × 64,957.87
4. Step 4: Simplify right side
   118,669.45x = 10,637,763,870.57
5. Step 5: Solve for x
   x = 10,637,763,870.57/118,669.45
6. Step 6: Final answer
   x = 89,641.98