Finding the Fourth Proportional to 118,555.56, 163,605.56 and 64,840.01

Step by Step Solution

1. Step 1: Write the proportion equation
   118,555.56 : 163,605.56 = 64,840.01 : x
2. Step 2: Convert to fraction form
   118,555.56/163,605.56 = 64,840.01/x
3. Step 3: Cross multiply
   118,555.56x = 163,605.56 × 64,840.01
4. Step 4: Simplify right side
   118,555.56x = 10,608,185,004.23
5. Step 5: Solve for x
   x = 10,608,185,004.23/118,555.56
6. Step 6: Final answer
   x = 89,478.60