Finding the Fourth Proportional to 119,782,962.72, 165,300,986.72 and 64,778,819.20

Step by Step Solution

1. Step 1: Write the proportion equation
   119,782,962.72 : 165,300,986.72 = 64,778,819.20 : x
2. Step 2: Convert to fraction form
   119,782,962.72/165,300,986.72 = 64,778,819.20/x
3. Step 3: Cross multiply
   119,782,962.72x = 165,300,986.72 × 64,778,819.20
4. Step 4: Simplify right side
   119,782,962.72x = 10,708,002,732,316,482
5. Step 5: Solve for x
   x = 10,708,002,732,316,482/119,782,962.72
6. Step 6: Final answer
   x = 89,395,039.91