Finding the Fourth Proportional to 64,799.94, 89,440.62 and 42,195.36

Step by Step Solution

1. Step 1: Write the proportion equation
   64,799.94 : 89,440.62 = 42,195.36 : x
2. Step 2: Convert to fraction form
   64,799.94/89,440.62 = 42,195.36/x
3. Step 3: Cross multiply
   64,799.94x = 89,440.62 × 42,195.36
4. Step 4: Simplify right side
   64,799.94x = 3,773,979,159.52
5. Step 5: Solve for x
   x = 3,773,979,159.52/64,799.94
6. Step 6: Final answer
   x = 58,240.47