Finding the Fourth Proportional to 118,473.31, 163,493.17 and 64,758.54

Step by Step Solution

1. Step 1: Write the proportion equation
   118,473.31 : 163,493.17 = 64,758.54 : x
2. Step 2: Convert to fraction form
   118,473.31/163,493.17 = 64,758.54/x
3. Step 3: Cross multiply
   118,473.31x = 163,493.17 × 64,758.54
4. Step 4: Simplify right side
   118,473.31x = 10,587,578,171.71
5. Step 5: Solve for x
   x = 10,587,578,171.71/118,473.31
6. Step 6: Final answer
   x = 89,366.78