Finding the Fourth Proportional to 74,828.49, 103,311.90 and 57,803.10

Step by Step Solution

1. Step 1: Write the proportion equation
   74,828.49 : 103,311.90 = 57,803.10 : x
2. Step 2: Convert to fraction form
   74,828.49/103,311.90 = 57,803.10/x
3. Step 3: Cross multiply
   74,828.49x = 103,311.90 × 57,803.10
4. Step 4: Simplify right side
   74,828.49x = 5,971,748,086.89
5. Step 5: Solve for x
   x = 5,971,748,086.89/74,828.49
6. Step 6: Final answer
   x = 79,805.81