Finding the Fourth Proportional to 118,393.01, 163,393.61 and 64,686.09

Step by Step Solution

1. Step 1: Write the proportion equation
   118,393.01 : 163,393.61 = 64,686.09 : x
2. Step 2: Convert to fraction form
   118,393.01/163,393.61 = 64,686.09/x
3. Step 3: Cross multiply
   118,393.01x = 163,393.61 × 64,686.09
4. Step 4: Simplify right side
   118,393.01x = 10,569,293,438.45
5. Step 5: Solve for x
   x = 10,569,293,438.45/118,393.01
6. Step 6: Final answer
   x = 89,272.96