Finding the Fourth Proportional to 102,320.30, 152,790 and 83,636.84

Step by Step Solution

1. Step 1: Write the proportion equation
   102,320.30 : 152,790 = 83,636.84 : x
2. Step 2: Convert to fraction form
   102,320.30/152,790 = 83,636.84/x
3. Step 3: Cross multiply
   102,320.30x = 152,790 × 83,636.84
4. Step 4: Simplify right side
   102,320.30x = 12,778,872,783.60
5. Step 5: Solve for x
   x = 12,778,872,783.60/102,320.30
6. Step 6: Final answer
   x = 124,890.88