Finding the Fourth Proportional to 102,445, 141,363.72 and 57,118.68

Step by Step Solution

1. Step 1: Write the proportion equation
   102,445 : 141,363.72 = 57,118.68 : x
2. Step 2: Convert to fraction form
   102,445/141,363.72 = 57,118.68/x
3. Step 3: Cross multiply
   102,445x = 141,363.72 × 57,118.68
4. Step 4: Simplify right side
   102,445x = 8,074,509,086.29
5. Step 5: Solve for x
   x = 8,074,509,086.29/102,445
6. Step 6: Final answer
   x = 78,817.99