Finding the Fourth Proportional to 55,381.93, 83,078.03 and 42,915.90

Step by Step Solution

1. Step 1: Write the proportion equation
   55,381.93 : 83,078.03 = 42,915.90 : x
2. Step 2: Convert to fraction form
   55,381.93/83,078.03 = 42,915.90/x
3. Step 3: Cross multiply
   55,381.93x = 83,078.03 × 42,915.90
4. Step 4: Simplify right side
   55,381.93x = 3,565,368,492.15
5. Step 5: Solve for x
   x = 3,565,368,492.15/55,381.93
6. Step 6: Final answer
   x = 64,377.83