Finding the Fourth Proportional to 76,471.71, 105,532.89 and 42,478.56

Step by Step Solution

1. Step 1: Write the proportion equation
   76,471.71 : 105,532.89 = 42,478.56 : x
2. Step 2: Convert to fraction form
   76,471.71/105,532.89 = 42,478.56/x
3. Step 3: Cross multiply
   76,471.71x = 105,532.89 × 42,478.56
4. Step 4: Simplify right side
   76,471.71x = 4,482,885,199.84
5. Step 5: Solve for x
   x = 4,482,885,199.84/76,471.71
6. Step 6: Final answer
   x = 58,621.48