Finding the Fourth Proportional to 118,570.94, 163,624.05 and 64,856.40

Step by Step Solution

1. Step 1: Write the proportion equation
   118,570.94 : 163,624.05 = 64,856.40 : x
2. Step 2: Convert to fraction form
   118,570.94/163,624.05 = 64,856.40/x
3. Step 3: Cross multiply
   118,570.94x = 163,624.05 × 64,856.40
4. Step 4: Simplify right side
   118,570.94x = 10,612,066,222.83
5. Step 5: Solve for x
   x = 10,612,066,222.83/118,570.94
6. Step 6: Final answer
   x = 89,499.72