Finding the Fourth Proportional to 117,899.56, 162,699.78 and 64,185.04

Step by Step Solution

1. Step 1: Write the proportion equation
   117,899.56 : 162,699.78 = 64,185.04 : x
2. Step 2: Convert to fraction form
   117,899.56/162,699.78 = 64,185.04/x
3. Step 3: Cross multiply
   117,899.56x = 162,699.78 × 64,185.04
4. Step 4: Simplify right side
   117,899.56x = 10,442,891,887.29
5. Step 5: Solve for x
   x = 10,442,891,887.29/117,899.56
6. Step 6: Final answer
   x = 88,574.48