Finding the Fourth Proportional to 76,491.54, 105,557.99 and 42,505.56

Step by Step Solution

1. Step 1: Write the proportion equation
   76,491.54 : 105,557.99 = 42,505.56 : x
2. Step 2: Convert to fraction form
   76,491.54/105,557.99 = 42,505.56/x
3. Step 3: Cross multiply
   76,491.54x = 105,557.99 × 42,505.56
4. Step 4: Simplify right side
   76,491.54x = 4,486,801,264.90
5. Step 5: Solve for x
   x = 4,486,801,264.90/76,491.54
6. Step 6: Final answer
   x = 58,657.48