Finding the Fourth Proportional to 81,724, 112,780.60 and 45,428.84

Step by Step Solution

1. Step 1: Write the proportion equation
   81,724 : 112,780.60 = 45,428.84 : x
2. Step 2: Convert to fraction form
   81,724/112,780.60 = 45,428.84/x
3. Step 3: Cross multiply
   81,724x = 112,780.60 × 45,428.84
4. Step 4: Simplify right side
   81,724x = 5,123,491,832.50
5. Step 5: Solve for x
   x = 5,123,491,832.50/81,724
6. Step 6: Final answer
   x = 62,692.62