Finding the Fourth Proportional to 74,309.20, 102,546.69 and 42,478.81

Step by Step Solution

1. Step 1: Write the proportion equation
   74,309.20 : 102,546.69 = 42,478.81 : x
2. Step 2: Convert to fraction form
   74,309.20/102,546.69 = 42,478.81/x
3. Step 3: Cross multiply
   74,309.20x = 102,546.69 × 42,478.81
4. Step 4: Simplify right side
   74,309.20x = 4,356,061,360.64
5. Step 5: Solve for x
   x = 4,356,061,360.64/74,309.20
6. Step 6: Final answer
   x = 58,620.75