Finding the Fourth Proportional to 103,789.55, 143,173.59 and 69,393.53

Step by Step Solution

1. Step 1: Write the proportion equation
   103,789.55 : 143,173.59 = 69,393.53 : x
2. Step 2: Convert to fraction form
   103,789.55/143,173.59 = 69,393.53/x
3. Step 3: Cross multiply
   103,789.55x = 143,173.59 × 69,393.53
4. Step 4: Simplify right side
   103,789.55x = 9,935,320,812.87
5. Step 5: Solve for x
   x = 9,935,320,812.87/103,789.55
6. Step 6: Final answer
   x = 95,725.64