Finding the Fourth Proportional to 123,788,788.42, 170,757,378.81 and 77,298,338.50

Step by Step Solution

1. Step 1: Write the proportion equation
   123,788,788.42 : 170,757,378.81 = 77,298,338.50 : x
2. Step 2: Convert to fraction form
   123,788,788.42/170,757,378.81 = 77,298,338.50/x
3. Step 3: Cross multiply
   123,788,788.42x = 170,757,378.81 × 77,298,338.50
4. Step 4: Simplify right side
   123,788,788.42x = 13,199,261,668,628,108
5. Step 5: Solve for x
   x = 13,199,261,668,628,108/123,788,788.42
6. Step 6: Final answer
   x = 106,627,278.91