Finding the Fourth Proportional to 147,428.87, 221,012.37 and 57,450.74

Step by Step Solution

1. Step 1: Write the proportion equation
   147,428.87 : 221,012.37 = 57,450.74 : x
2. Step 2: Convert to fraction form
   147,428.87/221,012.37 = 57,450.74/x
3. Step 3: Cross multiply
   147,428.87x = 221,012.37 × 57,450.74
4. Step 4: Simplify right side
   147,428.87x = 12,697,323,100.59
5. Step 5: Solve for x
   x = 12,697,323,100.59/147,428.87
6. Step 6: Final answer
   x = 86,125.08