Finding the Fourth Proportional to 65,219.86, 89,329.04 and 61,389.87

Step by Step Solution

1. Step 1: Write the proportion equation
   65,219.86 : 89,329.04 = 61,389.87 : x
2. Step 2: Convert to fraction form
   65,219.86/89,329.04 = 61,389.87/x
3. Step 3: Cross multiply
   65,219.86x = 89,329.04 × 61,389.87
4. Step 4: Simplify right side
   65,219.86x = 5,483,898,376.15
5. Step 5: Solve for x
   x = 5,483,898,376.15/65,219.86
6. Step 6: Final answer
   x = 84,083.27