Finding the Fourth Proportional to 151,395,137.07, 208,925,128.73 and 81,780,506.79

Step by Step Solution

1. Step 1: Write the proportion equation
   151,395,137.07 : 208,925,128.73 = 81,780,506.79 : x
2. Step 2: Convert to fraction form
   151,395,137.07/208,925,128.73 = 81,780,506.79/x
3. Step 3: Cross multiply
   151,395,137.07x = 208,925,128.73 × 81,780,506.79
4. Step 4: Simplify right side
   151,395,137.07x = 17,086,002,908,296,488
5. Step 5: Solve for x
   x = 17,086,002,908,296,488/151,395,137.07
6. Step 6: Final answer
   x = 112,857,012.71