Finding the Fourth Proportional to 87,145.89, 120,254.29 and 48,900.18

Step by Step Solution

1. Step 1: Write the proportion equation
   87,145.89 : 120,254.29 = 48,900.18 : x
2. Step 2: Convert to fraction form
   87,145.89/120,254.29 = 48,900.18/x
3. Step 3: Cross multiply
   87,145.89x = 120,254.29 × 48,900.18
4. Step 4: Simplify right side
   87,145.89x = 5,880,456,426.77
5. Step 5: Solve for x
   x = 5,880,456,426.77/87,145.89
6. Step 6: Final answer
   x = 67,478.30