Finding the Fourth Proportional to 58,021.10, 81,404.50 and 58,021.10

Step by Step Solution

1. Step 1: Write the proportion equation
   58,021.10 : 81,404.50 = 58,021.10 : x
2. Step 2: Convert to fraction form
   58,021.10/81,404.50 = 58,021.10/x
3. Step 3: Cross multiply
   58,021.10x = 81,404.50 × 58,021.10
4. Step 4: Simplify right side
   58,021.10x = 4,723,178,634.95
5. Step 5: Solve for x
   x = 4,723,178,634.95/58,021.10
6. Step 6: Final answer
   x = 81,404.50