Finding the Fourth Proportional to 105,126, 145,087.32 and 69,390.42

Step by Step Solution

1. Step 1: Write the proportion equation
   105,126 : 145,087.32 = 69,390.42 : x
2. Step 2: Convert to fraction form
   105,126/145,087.32 = 69,390.42/x
3. Step 3: Cross multiply
   105,126x = 145,087.32 × 69,390.42
4. Step 4: Simplify right side
   105,126x = 10,067,670,071.47
5. Step 5: Solve for x
   x = 10,067,670,071.47/105,126
6. Step 6: Final answer
   x = 95,767.65