Finding the Fourth Proportional to 429,297,788.72, 643,810,164.87 and 138,097,126.82

Step by Step Solution

1. Step 1: Write the proportion equation
   429,297,788.72 : 643,810,164.87 = 138,097,126.82 : x
2. Step 2: Convert to fraction form
   429,297,788.72/643,810,164.87 = 138,097,126.82/x
3. Step 3: Cross multiply
   429,297,788.72x = 643,810,164.87 × 138,097,126.82
4. Step 4: Simplify right side
   429,297,788.72x = 88,908,333,986,057,488
5. Step 5: Solve for x
   x = 88,908,333,986,057,488/429,297,788.72
6. Step 6: Final answer
   x = 207,101,774.86