Finding the Fourth Proportional to 118,288.47, 163,238.39 and 64,573.53

Step by Step Solution

1. Step 1: Write the proportion equation
   118,288.47 : 163,238.39 = 64,573.53 : x
2. Step 2: Convert to fraction form
   118,288.47/163,238.39 = 64,573.53/x
3. Step 3: Cross multiply
   118,288.47x = 163,238.39 × 64,573.53
4. Step 4: Simplify right side
   118,288.47x = 10,540,879,073.82
5. Step 5: Solve for x
   x = 10,540,879,073.82/118,288.47
6. Step 6: Final answer
   x = 89,111.64