Finding the Fourth Proportional to 105,556,574.52, 145,581,698.88 and 74,298,100.64

Step by Step Solution

1. Step 1: Write the proportion equation
   105,556,574.52 : 145,581,698.88 = 74,298,100.64 : x
2. Step 2: Convert to fraction form
   105,556,574.52/145,581,698.88 = 74,298,100.64/x
3. Step 3: Cross multiply
   105,556,574.52x = 145,581,698.88 × 74,298,100.64
4. Step 4: Simplify right side
   105,556,574.52x = 10,816,443,714,728,416
5. Step 5: Solve for x
   x = 10,816,443,714,728,416/105,556,574.52
6. Step 6: Final answer
   x = 102,470,582.85