Finding the Fourth Proportional to 118,439.82, 163,443.15 and 64,724.67

Step by Step Solution

1. Step 1: Write the proportion equation
   118,439.82 : 163,443.15 = 64,724.67 : x
2. Step 2: Convert to fraction form
   118,439.82/163,443.15 = 64,724.67/x
3. Step 3: Cross multiply
   118,439.82x = 163,443.15 × 64,724.67
4. Step 4: Simplify right side
   118,439.82x = 10,578,803,947.51
5. Step 5: Solve for x
   x = 10,578,803,947.51/118,439.82
6. Step 6: Final answer
   x = 89,317.97