Finding the Fourth Proportional to 148,421.72, 204,821.34 and 81,353.72

Step by Step Solution

1. Step 1: Write the proportion equation
   148,421.72 : 204,821.34 = 81,353.72 : x
2. Step 2: Convert to fraction form
   148,421.72/204,821.34 = 81,353.72/x
3. Step 3: Cross multiply
   148,421.72x = 204,821.34 × 81,353.72
4. Step 4: Simplify right side
   148,421.72x = 16,662,977,944.38
5. Step 5: Solve for x
   x = 16,662,977,944.38/148,421.72
6. Step 6: Final answer
   x = 112,267.79