Finding the Fourth Proportional to 83,641.59, 115,386.89 and 53,411.78

Step by Step Solution

1. Step 1: Write the proportion equation
   83,641.59 : 115,386.89 = 53,411.78 : x
2. Step 2: Convert to fraction form
   83,641.59/115,386.89 = 53,411.78/x
3. Step 3: Cross multiply
   83,641.59x = 115,386.89 × 53,411.78
4. Step 4: Simplify right side
   83,641.59x = 6,163,019,605.56
5. Step 5: Solve for x
   x = 6,163,019,605.56/83,641.59
6. Step 6: Final answer
   x = 73,683.67