Finding the Fourth Proportional to 152,868.78, 210,951.88 and 84,890.10

Step by Step Solution

1. Step 1: Write the proportion equation
   152,868.78 : 210,951.88 = 84,890.10 : x
2. Step 2: Convert to fraction form
   152,868.78/210,951.88 = 84,890.10/x
3. Step 3: Cross multiply
   152,868.78x = 210,951.88 × 84,890.10
4. Step 4: Simplify right side
   152,868.78x = 17,907,725,763.94
5. Step 5: Solve for x
   x = 17,907,725,763.94/152,868.78
6. Step 6: Final answer
   x = 117,144.43