Finding the Fourth Proportional to 99,291, 148,936.41 and 69,840.57

Step by Step Solution

1. Step 1: Write the proportion equation
   99,291 : 148,936.41 = 69,840.57 : x
2. Step 2: Convert to fraction form
   99,291/148,936.41 = 69,840.57/x
3. Step 3: Cross multiply
   99,291x = 148,936.41 × 69,840.57
4. Step 4: Simplify right side
   99,291x = 10,401,803,768.15
5. Step 5: Solve for x
   x = 10,401,803,768.15/99,291
6. Step 6: Final answer
   x = 104,760.79