Finding the Fourth Proportional to 118,642.37, 163,726.47 and 64,927.40

Step by Step Solution

1. Step 1: Write the proportion equation
   118,642.37 : 163,726.47 = 64,927.40 : x
2. Step 2: Convert to fraction form
   118,642.37/163,726.47 = 64,927.40/x
3. Step 3: Cross multiply
   118,642.37x = 163,726.47 × 64,927.40
4. Step 4: Simplify right side
   118,642.37x = 10,630,333,189.65
5. Step 5: Solve for x
   x = 10,630,333,189.65/118,642.37
6. Step 6: Final answer
   x = 89,599.81