Finding the Fourth Proportional to 76,397, 105,427.86 and 42,862.28

Step by Step Solution

1. Step 1: Write the proportion equation
   76,397 : 105,427.86 = 42,862.28 : x
2. Step 2: Convert to fraction form
   76,397/105,427.86 = 42,862.28/x
3. Step 3: Cross multiply
   76,397x = 105,427.86 × 42,862.28
4. Step 4: Simplify right side
   76,397x = 4,518,878,455.12
5. Step 5: Solve for x
   x = 4,518,878,455.12/76,397
6. Step 6: Final answer
   x = 59,149.95