Finding the Fourth Proportional to 65,055.54, 89,801.42 and 42,400.05

Step by Step Solution

1. Step 1: Write the proportion equation
   65,055.54 : 89,801.42 = 42,400.05 : x
2. Step 2: Convert to fraction form
   65,055.54/89,801.42 = 42,400.05/x
3. Step 3: Cross multiply
   65,055.54x = 89,801.42 × 42,400.05
4. Step 4: Simplify right side
   65,055.54x = 3,807,584,698.07
5. Step 5: Solve for x
   x = 3,807,584,698.07/65,055.54
6. Step 6: Final answer
   x = 58,528.22