Finding the Fourth Proportional to 139,969,009.70, 209,953,514.55 and 137,701,528.10

Step by Step Solution

1. Step 1: Write the proportion equation
   139,969,009.70 : 209,953,514.55 = 137,701,528.10 : x
2. Step 2: Convert to fraction form
   139,969,009.70/209,953,514.55 = 137,701,528.10/x
3. Step 3: Cross multiply
   139,969,009.70x = 209,953,514.55 × 137,701,528.10
4. Step 4: Simplify right side
   139,969,009.70x = 28,910,919,783,500,584
5. Step 5: Solve for x
   x = 28,910,919,783,500,584/139,969,009.70
6. Step 6: Final answer
   x = 206,552,292.15