Finding the Fourth Proportional to 65,557.35, 90,445.82 and 38,686.41

Step by Step Solution

1. Step 1: Write the proportion equation
   65,557.35 : 90,445.82 = 38,686.41 : x
2. Step 2: Convert to fraction form
   65,557.35/90,445.82 = 38,686.41/x
3. Step 3: Cross multiply
   65,557.35x = 90,445.82 × 38,686.41
4. Step 4: Simplify right side
   65,557.35x = 3,499,023,881.87
5. Step 5: Solve for x
   x = 3,499,023,881.87/65,557.35
6. Step 6: Final answer
   x = 53,373.48