Finding the Fourth Proportional to 152,621.37, 210,613.50 and 84,638.21

Step by Step Solution

1. Step 1: Write the proportion equation
   152,621.37 : 210,613.50 = 84,638.21 : x
2. Step 2: Convert to fraction form
   152,621.37/210,613.50 = 84,638.21/x
3. Step 3: Cross multiply
   152,621.37x = 210,613.50 × 84,638.21
4. Step 4: Simplify right side
   152,621.37x = 17,825,948,588.77
5. Step 5: Solve for x
   x = 17,825,948,588.77/152,621.37
6. Step 6: Final answer
   x = 116,798.51