Finding the Fourth Proportional to 88,393, 121,745.70 and 76,456.84

Step by Step Solution

1. Step 1: Write the proportion equation
   88,393 : 121,745.70 = 76,456.84 : x
2. Step 2: Convert to fraction form
   88,393/121,745.70 = 76,456.84/x
3. Step 3: Cross multiply
   88,393x = 121,745.70 × 76,456.84
4. Step 4: Simplify right side
   88,393x = 9,308,291,505.59
5. Step 5: Solve for x
   x = 9,308,291,505.59/88,393
6. Step 6: Final answer
   x = 105,305.75