Finding the Fourth Proportional to 105,784.72, 158,527.92 and 58,421.16

Step by Step Solution

1. Step 1: Write the proportion equation
   105,784.72 : 158,527.92 = 58,421.16 : x
2. Step 2: Convert to fraction form
   105,784.72/158,527.92 = 58,421.16/x
3. Step 3: Cross multiply
   105,784.72x = 158,527.92 × 58,421.16
4. Step 4: Simplify right side
   105,784.72x = 9,261,384,978.79
5. Step 5: Solve for x
   x = 9,261,384,978.79/105,784.72
6. Step 6: Final answer
   x = 87,549.36