Finding the Fourth Proportional to 118,357.78, 163,332.86 and 64,642.82

Step by Step Solution

1. Step 1: Write the proportion equation
   118,357.78 : 163,332.86 = 64,642.82 : x
2. Step 2: Convert to fraction form
   118,357.78/163,332.86 = 64,642.82/x
3. Step 3: Cross multiply
   118,357.78x = 163,332.86 × 64,642.82
4. Step 4: Simplify right side
   118,357.78x = 10,558,296,669.07
5. Step 5: Solve for x
   x = 10,558,296,669.07/118,357.78
6. Step 6: Final answer
   x = 89,206.61