Finding the Fourth Proportional to 64,796.90, 89,436.42 and 42,192.36

Step by Step Solution

1. Step 1: Write the proportion equation
   64,796.90 : 89,436.42 = 42,192.36 : x
2. Step 2: Convert to fraction form
   64,796.90/89,436.42 = 42,192.36/x
3. Step 3: Cross multiply
   64,796.90x = 89,436.42 × 42,192.36
4. Step 4: Simplify right side
   64,796.90x = 3,773,533,629.75
5. Step 5: Solve for x
   x = 3,773,533,629.75/64,796.90
6. Step 6: Final answer
   x = 58,236.33