Finding the Fourth Proportional to 144,639,520.72, 199,519,152.84 and 86,659,176.40

Step by Step Solution

1. Step 1: Write the proportion equation
   144,639,520.72 : 199,519,152.84 = 86,659,176.40 : x
2. Step 2: Convert to fraction form
   144,639,520.72/199,519,152.84 = 86,659,176.40/x
3. Step 3: Cross multiply
   144,639,520.72x = 199,519,152.84 × 86,659,176.40
4. Step 4: Simplify right side
   144,639,520.72x = 17,290,165,461,140,122
5. Step 5: Solve for x
   x = 17,290,165,461,140,122/144,639,520.72
6. Step 6: Final answer
   x = 119,539,703.78