Finding the Fourth Proportional to 201,632,946.10, 302,449,419.15 and 139,215,200.65

Step by Step Solution

1. Step 1: Write the proportion equation
   201,632,946.10 : 302,449,419.15 = 139,215,200.65 : x
2. Step 2: Convert to fraction form
   201,632,946.10/302,449,419.15 = 139,215,200.65/x
3. Step 3: Cross multiply
   201,632,946.10x = 302,449,419.15 × 139,215,200.65
4. Step 4: Simplify right side
   201,632,946.10x = 42,105,556,573,443,200
5. Step 5: Solve for x
   x = 42,105,556,573,443,200/201,632,946.10
6. Step 6: Final answer
   x = 208,822,800.98