Finding the Fourth Proportional to 105,758.28, 145,946.52 and 58,012.56

Step by Step Solution

1. Step 1: Write the proportion equation
   105,758.28 : 145,946.52 = 58,012.56 : x
2. Step 2: Convert to fraction form
   105,758.28/145,946.52 = 58,012.56/x
3. Step 3: Cross multiply
   105,758.28x = 145,946.52 × 58,012.56
4. Step 4: Simplify right side
   105,758.28x = 8,466,731,248.29
5. Step 5: Solve for x
   x = 8,466,731,248.29/105,758.28
6. Step 6: Final answer
   x = 80,057.38