Finding the Fourth Proportional to 76,492, 105,529.38 and 56,396.56

Step by Step Solution

1. Step 1: Write the proportion equation
   76,492 : 105,529.38 = 56,396.56 : x
2. Step 2: Convert to fraction form
   76,492/105,529.38 = 56,396.56/x
3. Step 3: Cross multiply
   76,492x = 105,529.38 × 56,396.56
4. Step 4: Simplify right side
   76,492x = 5,951,494,010.93
5. Step 5: Solve for x
   x = 5,951,494,010.93/76,492
6. Step 6: Final answer
   x = 77,805.44