Finding the Fourth Proportional to 103,185.55, 142,335.72 and 64,884.48

Step by Step Solution

1. Step 1: Write the proportion equation
   103,185.55 : 142,335.72 = 64,884.48 : x
2. Step 2: Convert to fraction form
   103,185.55/142,335.72 = 64,884.48/x
3. Step 3: Cross multiply
   103,185.55x = 142,335.72 × 64,884.48
4. Step 4: Simplify right side
   103,185.55x = 9,235,378,628.16
5. Step 5: Solve for x
   x = 9,235,378,628.16/103,185.55
6. Step 6: Final answer
   x = 89,502.64