Finding the Fourth Proportional to 117,288.50, 161,858.13 and 64,296.50

Step by Step Solution

1. Step 1: Write the proportion equation
   117,288.50 : 161,858.13 = 64,296.50 : x
2. Step 2: Convert to fraction form
   117,288.50/161,858.13 = 64,296.50/x
3. Step 3: Cross multiply
   117,288.50x = 161,858.13 × 64,296.50
4. Step 4: Simplify right side
   117,288.50x = 10,406,911,255.55
5. Step 5: Solve for x
   x = 10,406,911,255.55/117,288.50
6. Step 6: Final answer
   x = 88,729.17