Finding the Fourth Proportional to 99,996.76, 137,990.46 and 55,276.12

Step by Step Solution

1. Step 1: Write the proportion equation
   99,996.76 : 137,990.46 = 55,276.12 : x
2. Step 2: Convert to fraction form
   99,996.76/137,990.46 = 55,276.12/x
3. Step 3: Cross multiply
   99,996.76x = 137,990.46 × 55,276.12
4. Step 4: Simplify right side
   99,996.76x = 7,627,577,225.82
5. Step 5: Solve for x
   x = 7,627,577,225.82/99,996.76
6. Step 6: Final answer
   x = 76,278.24