Finding the Fourth Proportional to 99,788.32, 137,707.60 and 55,076

Step by Step Solution

1. Step 1: Write the proportion equation
   99,788.32 : 137,707.60 = 55,076 : x
2. Step 2: Convert to fraction form
   99,788.32/137,707.60 = 55,076/x
3. Step 3: Cross multiply
   99,788.32x = 137,707.60 × 55,076
4. Step 4: Simplify right side
   99,788.32x = 7,584,383,777.60
5. Step 5: Solve for x
   x = 7,584,383,777.60/99,788.32
6. Step 6: Final answer
   x = 76,004.72