Finding the Fourth Proportional to 125,346, 188,028.72 and 42,240

Step by Step Solution

1. Step 1: Write the proportion equation
   125,346 : 188,028.72 = 42,240 : x
2. Step 2: Convert to fraction form
   125,346/188,028.72 = 42,240/x
3. Step 3: Cross multiply
   125,346x = 188,028.72 × 42,240
4. Step 4: Simplify right side
   125,346x = 7,942,333,132.80
5. Step 5: Solve for x
   x = 7,942,333,132.80/125,346
6. Step 6: Final answer
   x = 63,363.28