Finding the Fourth Proportional to 425,401.55, 637,885.28 and 140,990.84

Step by Step Solution

1. Step 1: Write the proportion equation
   425,401.55 : 637,885.28 = 140,990.84 : x
2. Step 2: Convert to fraction form
   425,401.55/637,885.28 = 140,990.84/x
3. Step 3: Cross multiply
   425,401.55x = 637,885.28 × 140,990.84
4. Step 4: Simplify right side
   425,401.55x = 89,935,979,151.17
5. Step 5: Solve for x
   x = 89,935,979,151.17/425,401.55
6. Step 6: Final answer
   x = 211,414.32