Finding the Fourth Proportional to 65,317.50, 90,157.40 and 42,659.99

Step by Step Solution

1. Step 1: Write the proportion equation
   65,317.50 : 90,157.40 = 42,659.99 : x
2. Step 2: Convert to fraction form
   65,317.50/90,157.40 = 42,659.99/x
3. Step 3: Cross multiply
   65,317.50x = 90,157.40 × 42,659.99
4. Step 4: Simplify right side
   65,317.50x = 3,846,113,118.34
5. Step 5: Solve for x
   x = 3,846,113,118.34/65,317.50
6. Step 6: Final answer
   x = 58,883.35