Finding the Fourth Proportional to 99,128.82, 148,693.43 and 69,678.44

Step by Step Solution

1. Step 1: Write the proportion equation
   99,128.82 : 148,693.43 = 69,678.44 : x
2. Step 2: Convert to fraction form
   99,128.82/148,693.43 = 69,678.44/x
3. Step 3: Cross multiply
   99,128.82x = 148,693.43 × 69,678.44
4. Step 4: Simplify right side
   99,128.82x = 10,360,725,671.38
5. Step 5: Solve for x
   x = 10,360,725,671.38/99,128.82
6. Step 6: Final answer
   x = 104,517.79