Finding the Fourth Proportional to 117,904.72, 162,707.54 and 64,189.63

Step by Step Solution

1. Step 1: Write the proportion equation
   117,904.72 : 162,707.54 = 64,189.63 : x
2. Step 2: Convert to fraction form
   117,904.72/162,707.54 = 64,189.63/x
3. Step 3: Cross multiply
   117,904.72x = 162,707.54 × 64,189.63
4. Step 4: Simplify right side
   117,904.72x = 10,444,136,790.81
5. Step 5: Solve for x
   x = 10,444,136,790.81/117,904.72
6. Step 6: Final answer
   x = 88,581.16