Finding the Fourth Proportional to 117,886.78, 162,685.83 and 64,173.34

Step by Step Solution

1. Step 1: Write the proportion equation
   117,886.78 : 162,685.83 = 64,173.34 : x
2. Step 2: Convert to fraction form
   117,886.78/162,685.83 = 64,173.34/x
3. Step 3: Cross multiply
   117,886.78x = 162,685.83 × 64,173.34
4. Step 4: Simplify right side
   117,886.78x = 10,440,093,081.77
5. Step 5: Solve for x
   x = 10,440,093,081.77/117,886.78
6. Step 6: Final answer
   x = 88,560.34