Finding the Fourth Proportional to 105,776,734.56, 157,952,799.66 and 86,384,430.42

Step by Step Solution

1. Step 1: Write the proportion equation
   105,776,734.56 : 157,952,799.66 = 86,384,430.42 : x
2. Step 2: Convert to fraction form
   105,776,734.56/157,952,799.66 = 86,384,430.42/x
3. Step 3: Cross multiply
   105,776,734.56x = 157,952,799.66 × 86,384,430.42
4. Step 4: Simplify right side
   105,776,734.56x = 13,644,662,631,873,470
5. Step 5: Solve for x
   x = 13,644,662,631,873,470/105,776,734.56
6. Step 6: Final answer
   x = 128,994,931.53