Finding the Fourth Proportional to 99,620, 137,477.76 and 54,908

Step by Step Solution

1. Step 1: Write the proportion equation
   99,620 : 137,477.76 = 54,908 : x
2. Step 2: Convert to fraction form
   99,620/137,477.76 = 54,908/x
3. Step 3: Cross multiply
   99,620x = 137,477.76 × 54,908
4. Step 4: Simplify right side
   99,620x = 7,548,628,846.08
5. Step 5: Solve for x
   x = 7,548,628,846.08/99,620
6. Step 6: Final answer
   x = 75,774.23