Finding the Fourth Proportional to 99,132, 136,804.32 and 54,420

Step by Step Solution

1. Step 1: Write the proportion equation
   99,132 : 136,804.32 = 54,420 : x
2. Step 2: Convert to fraction form
   99,132/136,804.32 = 54,420/x
3. Step 3: Cross multiply
   99,132x = 136,804.32 × 54,420
4. Step 4: Simplify right side
   99,132x = 7,444,891,094.40
5. Step 5: Solve for x
   x = 7,444,891,094.40/99,132
6. Step 6: Final answer
   x = 75,100.79