Finding the Fourth Proportional to 152,628.48, 210,619.98 and 84,640.12

Step by Step Solution

1. Step 1: Write the proportion equation
   152,628.48 : 210,619.98 = 84,640.12 : x
2. Step 2: Convert to fraction form
   152,628.48/210,619.98 = 84,640.12/x
3. Step 3: Cross multiply
   152,628.48x = 210,619.98 × 84,640.12
4. Step 4: Simplify right side
   152,628.48x = 17,826,900,381.60
5. Step 5: Solve for x
   x = 17,826,900,381.60/152,628.48
6. Step 6: Final answer
   x = 116,799.30