Finding the Fourth Proportional to 154,185,923.53, 212,824,219.72 and 99,181,780.03

Step by Step Solution

1. Step 1: Write the proportion equation
   154,185,923.53 : 212,824,219.72 = 99,181,780.03 : x
2. Step 2: Convert to fraction form
   154,185,923.53/212,824,219.72 = 99,181,780.03/x
3. Step 3: Cross multiply
   154,185,923.53x = 212,824,219.72 × 99,181,780.03
4. Step 4: Simplify right side
   154,185,923.53x = 21,108,284,944,261,308
5. Step 5: Solve for x
   x = 21,108,284,944,261,308/154,185,923.53
6. Step 6: Final answer
   x = 136,901,504.77