Finding the Fourth Proportional to 65,007.90, 89,510.94 and 55,426.50

Step by Step Solution

1. Step 1: Write the proportion equation
   65,007.90 : 89,510.94 = 55,426.50 : x
2. Step 2: Convert to fraction form
   65,007.90/89,510.94 = 55,426.50/x
3. Step 3: Cross multiply
   65,007.90x = 89,510.94 × 55,426.50
4. Step 4: Simplify right side
   65,007.90x = 4,961,278,115.91
5. Step 5: Solve for x
   x = 4,961,278,115.91/65,007.90
6. Step 6: Final answer
   x = 76,318.08