Finding the Fourth Proportional to 118,693.74, 163,797.35 and 64,978.59

Step by Step Solution

1. Step 1: Write the proportion equation
   118,693.74 : 163,797.35 = 64,978.59 : x
2. Step 2: Convert to fraction form
   118,693.74/163,797.35 = 64,978.59/x
3. Step 3: Cross multiply
   118,693.74x = 163,797.35 × 64,978.59
4. Step 4: Simplify right side
   118,693.74x = 10,643,320,848.74
5. Step 5: Solve for x
   x = 10,643,320,848.74/118,693.74
6. Step 6: Final answer
   x = 89,670.45