Finding the Fourth Proportional to 118,405.89, 163,395.27 and 64,692.77

Step by Step Solution

1. Step 1: Write the proportion equation
   118,405.89 : 163,395.27 = 64,692.77 : x
2. Step 2: Convert to fraction form
   118,405.89/163,395.27 = 64,692.77/x
3. Step 3: Cross multiply
   118,405.89x = 163,395.27 × 64,692.77
4. Step 4: Simplify right side
   118,405.89x = 10,570,491,804.22
5. Step 5: Solve for x
   x = 10,570,491,804.22/118,405.89
6. Step 6: Final answer
   x = 89,273.36