Finding the Fourth Proportional to 105,547.32, 145,647.72 and 57,792.96

Step by Step Solution

1. Step 1: Write the proportion equation
   105,547.32 : 145,647.72 = 57,792.96 : x
2. Step 2: Convert to fraction form
   105,547.32/145,647.72 = 57,792.96/x
3. Step 3: Cross multiply
   105,547.32x = 145,647.72 × 57,792.96
4. Step 4: Simplify right side
   105,547.32x = 8,417,412,856.05
5. Step 5: Solve for x
   x = 8,417,412,856.05/105,547.32
6. Step 6: Final answer
   x = 79,750.13