Finding the Fourth Proportional to 154,144, 212,718.72 and 83,488

Step by Step Solution

1. Step 1: Write the proportion equation
   154,144 : 212,718.72 = 83,488 : x
2. Step 2: Convert to fraction form
   154,144/212,718.72 = 83,488/x
3. Step 3: Cross multiply
   154,144x = 212,718.72 × 83,488
4. Step 4: Simplify right side
   154,144x = 17,759,460,495.36
5. Step 5: Solve for x
   x = 17,759,460,495.36/154,144
6. Step 6: Final answer
   x = 115,213.44