Finding the Fourth Proportional to 81,443.84, 112,389.78 and 45,143.76

Step by Step Solution

1. Step 1: Write the proportion equation
   81,443.84 : 112,389.78 = 45,143.76 : x
2. Step 2: Convert to fraction form
   81,443.84/112,389.78 = 45,143.76/x
3. Step 3: Cross multiply
   81,443.84x = 112,389.78 × 45,143.76
4. Step 4: Simplify right side
   81,443.84x = 5,073,697,254.77
5. Step 5: Solve for x
   x = 5,073,697,254.77/81,443.84
6. Step 6: Final answer
   x = 62,296.88