Finding the Fourth Proportional to 66,493.89, 91,761.52 and 42,620.54

Step by Step Solution

1. Step 1: Write the proportion equation
   66,493.89 : 91,761.52 = 42,620.54 : x
2. Step 2: Convert to fraction form
   66,493.89/91,761.52 = 42,620.54/x
3. Step 3: Cross multiply
   66,493.89x = 91,761.52 × 42,620.54
4. Step 4: Simplify right side
   66,493.89x = 3,910,925,533.62
5. Step 5: Solve for x
   x = 3,910,925,533.62/66,493.89
6. Step 6: Final answer
   x = 58,816.31