Finding the Fourth Proportional to 118,647.90, 163,734.17 and 64,932.89

Step by Step Solution

1. Step 1: Write the proportion equation
   118,647.90 : 163,734.17 = 64,932.89 : x
2. Step 2: Convert to fraction form
   118,647.90/163,734.17 = 64,932.89/x
3. Step 3: Cross multiply
   118,647.90x = 163,734.17 × 64,932.89
4. Step 4: Simplify right side
   118,647.90x = 10,631,731,706.52
5. Step 5: Solve for x
   x = 10,631,731,706.52/118,647.90
6. Step 6: Final answer
   x = 89,607.42