Finding the Fourth Proportional to 42,398.64, 58,436.64 and 31,769.82

Step by Step Solution

1. Step 1: Write the proportion equation
   42,398.64 : 58,436.64 = 31,769.82 : x
2. Step 2: Convert to fraction form
   42,398.64/58,436.64 = 31,769.82/x
3. Step 3: Cross multiply
   42,398.64x = 58,436.64 × 31,769.82
4. Step 4: Simplify right side
   42,398.64x = 1,856,521,534.20
5. Step 5: Solve for x
   x = 1,856,521,534.20/42,398.64
6. Step 6: Final answer
   x = 43,787.29