Finding the Fourth Proportional to 61,664.65, 85,078.43 and 42,550.81

Step by Step Solution

1. Step 1: Write the proportion equation
   61,664.65 : 85,078.43 = 42,550.81 : x
2. Step 2: Convert to fraction form
   61,664.65/85,078.43 = 42,550.81/x
3. Step 3: Cross multiply
   61,664.65x = 85,078.43 × 42,550.81
4. Step 4: Simplify right side
   61,664.65x = 3,620,155,897.27
5. Step 5: Solve for x
   x = 3,620,155,897.27/61,664.65
6. Step 6: Final answer
   x = 58,707.15