Finding the Fourth Proportional to 74,947.83, 103,380.45 and 57,003.50

Step by Step Solution

1. Step 1: Write the proportion equation
   74,947.83 : 103,380.45 = 57,003.50 : x
2. Step 2: Convert to fraction form
   74,947.83/103,380.45 = 57,003.50/x
3. Step 3: Cross multiply
   74,947.83x = 103,380.45 × 57,003.50
4. Step 4: Simplify right side
   74,947.83x = 5,893,046,964.67
5. Step 5: Solve for x
   x = 5,893,046,964.67/74,947.83
6. Step 6: Final answer
   x = 78,628.65