Finding the Fourth Proportional to 102,028.56, 152,990.16 and 45,820.50

Step by Step Solution

1. Step 1: Write the proportion equation
   102,028.56 : 152,990.16 = 45,820.50 : x
2. Step 2: Convert to fraction form
   102,028.56/152,990.16 = 45,820.50/x
3. Step 3: Cross multiply
   102,028.56x = 152,990.16 × 45,820.50
4. Step 4: Simplify right side
   102,028.56x = 7,010,085,626.28
5. Step 5: Solve for x
   x = 7,010,085,626.28/102,028.56
6. Step 6: Final answer
   x = 68,707.09