Finding the Fourth Proportional to 190,960,550.72, 263,317,025.76 and 128,973,271.04

Step by Step Solution

1. Step 1: Write the proportion equation
   190,960,550.72 : 263,317,025.76 = 128,973,271.04 : x
2. Step 2: Convert to fraction form
   190,960,550.72/263,317,025.76 = 128,973,271.04/x
3. Step 3: Cross multiply
   190,960,550.72x = 263,317,025.76 × 128,973,271.04
4. Step 4: Simplify right side
   190,960,550.72x = 33,960,858,132,791,144
5. Step 5: Solve for x
   x = 33,960,858,132,791,144/190,960,550.72
6. Step 6: Final answer
   x = 177,842,271.64