Finding the Fourth Proportional to 105,144.47, 145,082.27 and 62,117.99

Step by Step Solution

1. Step 1: Write the proportion equation
   105,144.47 : 145,082.27 = 62,117.99 : x
2. Step 2: Convert to fraction form
   105,144.47/145,082.27 = 62,117.99/x
3. Step 3: Cross multiply
   105,144.47x = 145,082.27 × 62,117.99
4. Step 4: Simplify right side
   105,144.47x = 9,012,217,961.04
5. Step 5: Solve for x
   x = 9,012,217,961.04/105,144.47
6. Step 6: Final answer
   x = 85,712.71