Finding the Fourth Proportional to 65,303.38, 90,106.32 and 61,981.57

Step by Step Solution

1. Step 1: Write the proportion equation
   65,303.38 : 90,106.32 = 61,981.57 : x
2. Step 2: Convert to fraction form
   65,303.38/90,106.32 = 61,981.57/x
3. Step 3: Cross multiply
   65,303.38x = 90,106.32 × 61,981.57
4. Step 4: Simplify right side
   65,303.38x = 5,584,931,180.52
5. Step 5: Solve for x
   x = 5,584,931,180.52/65,303.38
6. Step 6: Final answer
   x = 85,522.85