Finding the Fourth Proportional to 118,436.61, 163,435.57 and 64,722.04

Step by Step Solution

1. Step 1: Write the proportion equation
   118,436.61 : 163,435.57 = 64,722.04 : x
2. Step 2: Convert to fraction form
   118,436.61/163,435.57 = 64,722.04/x
3. Step 3: Cross multiply
   118,436.61x = 163,435.57 × 64,722.04
4. Step 4: Simplify right side
   118,436.61x = 10,577,883,498.96
5. Step 5: Solve for x
   x = 10,577,883,498.96/118,436.61
6. Step 6: Final answer
   x = 89,312.62