Finding the Fourth Proportional to 82,140.56, 123,210.57 and 19,811.06

Step by Step Solution

1. Step 1: Write the proportion equation
   82,140.56 : 123,210.57 = 19,811.06 : x
2. Step 2: Convert to fraction form
   82,140.56/123,210.57 = 19,811.06/x
3. Step 3: Cross multiply
   82,140.56x = 123,210.57 × 19,811.06
4. Step 4: Simplify right side
   82,140.56x = 2,440,931,994.90
5. Step 5: Solve for x
   x = 2,440,931,994.90/82,140.56
6. Step 6: Final answer
   x = 29,716.52