Finding the Fourth Proportional to 87,145.49, 120,250.89 and 48,900.03

Step by Step Solution

1. Step 1: Write the proportion equation
   87,145.49 : 120,250.89 = 48,900.03 : x
2. Step 2: Convert to fraction form
   87,145.49/120,250.89 = 48,900.03/x
3. Step 3: Cross multiply
   87,145.49x = 120,250.89 × 48,900.03
4. Step 4: Simplify right side
   87,145.49x = 5,880,272,128.53
5. Step 5: Solve for x
   x = 5,880,272,128.53/87,145.49
6. Step 6: Final answer
   x = 67,476.49