Finding the Fourth Proportional to 76,552, 105,639.60 and 43,018.72

Step by Step Solution

1. Step 1: Write the proportion equation
   76,552 : 105,639.60 = 43,018.72 : x
2. Step 2: Convert to fraction form
   76,552/105,639.60 = 43,018.72/x
3. Step 3: Cross multiply
   76,552x = 105,639.60 × 43,018.72
4. Step 4: Simplify right side
   76,552x = 4,544,480,373.31
5. Step 5: Solve for x
   x = 4,544,480,373.31/76,552
6. Step 6: Final answer
   x = 59,364.62