Finding the Fourth Proportional to 65,386.90, 90,210.69 and 42,738.94

Step by Step Solution

1. Step 1: Write the proportion equation
   65,386.90 : 90,210.69 = 42,738.94 : x
2. Step 2: Convert to fraction form
   65,386.90/90,210.69 = 42,738.94/x
3. Step 3: Cross multiply
   65,386.90x = 90,210.69 × 42,738.94
4. Step 4: Simplify right side
   65,386.90x = 3,855,509,259.83
5. Step 5: Solve for x
   x = 3,855,509,259.83/65,386.90
6. Step 6: Final answer
   x = 58,964.56