Finding the Fourth Proportional to 120,069.89, 165,691.98 and 69,090.50

Step by Step Solution

1. Step 1: Write the proportion equation
   120,069.89 : 165,691.98 = 69,090.50 : x
2. Step 2: Convert to fraction form
   120,069.89/165,691.98 = 69,090.50/x
3. Step 3: Cross multiply
   120,069.89x = 165,691.98 × 69,090.50
4. Step 4: Simplify right side
   120,069.89x = 11,447,742,158.42
5. Step 5: Solve for x
   x = 11,447,742,158.42/120,069.89
6. Step 6: Final answer
   x = 95,342.32