Finding the Fourth Proportional to 76,471.33, 105,547.31 and 42,491.50

Step by Step Solution

1. Step 1: Write the proportion equation
   76,471.33 : 105,547.31 = 42,491.50 : x
2. Step 2: Convert to fraction form
   76,471.33/105,547.31 = 42,491.50/x
3. Step 3: Cross multiply
   76,471.33x = 105,547.31 × 42,491.50
4. Step 4: Simplify right side
   76,471.33x = 4,484,863,444.90
5. Step 5: Solve for x
   x = 4,484,863,444.90/76,471.33
6. Step 6: Final answer
   x = 58,647.65