Finding the Fourth Proportional to 148,143.30, 222,339.39 and 138,801.57

Step by Step Solution

1. Step 1: Write the proportion equation
   148,143.30 : 222,339.39 = 138,801.57 : x
2. Step 2: Convert to fraction form
   148,143.30/222,339.39 = 138,801.57/x
3. Step 3: Cross multiply
   148,143.30x = 222,339.39 × 138,801.57
4. Step 4: Simplify right side
   148,143.30x = 30,861,056,404.84
5. Step 5: Solve for x
   x = 30,861,056,404.84/148,143.30
6. Step 6: Final answer
   x = 208,318.95