Finding the Fourth Proportional to 65,090.84, 89,810.86 and 42,427.80

Step by Step Solution

1. Step 1: Write the proportion equation
   65,090.84 : 89,810.86 = 42,427.80 : x
2. Step 2: Convert to fraction form
   65,090.84/89,810.86 = 42,427.80/x
3. Step 3: Cross multiply
   65,090.84x = 89,810.86 × 42,427.80
4. Step 4: Simplify right side
   65,090.84x = 3,810,477,205.91
5. Step 5: Solve for x
   x = 3,810,477,205.91/65,090.84
6. Step 6: Final answer
   x = 58,540.91