Finding the Fourth Proportional to 42,320.64, 58,412.16 and 27,390.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,320.64 : 58,412.16 = 27,390.72 : x
2. Step 2: Convert to fraction form
   42,320.64/58,412.16 = 27,390.72/x
3. Step 3: Cross multiply
   42,320.64x = 58,412.16 × 27,390.72
4. Step 4: Simplify right side
   42,320.64x = 1,599,951,119.16
5. Step 5: Solve for x
   x = 1,599,951,119.16/42,320.64
6. Step 6: Final answer
   x = 37,805.46