Finding the Fourth Proportional to 139,968,009.05, 209,952,013.58 and 103,688,303.45

Step by Step Solution

1. Step 1: Write the proportion equation
   139,968,009.05 : 209,952,013.58 = 103,688,303.45 : x
2. Step 2: Convert to fraction form
   139,968,009.05/209,952,013.58 = 103,688,303.45/x
3. Step 3: Cross multiply
   139,968,009.05x = 209,952,013.58 × 103,688,303.45
4. Step 4: Simplify right side
   139,968,009.05x = 21,769,568,094,021,564
5. Step 5: Solve for x
   x = 21,769,568,094,021,564/139,968,009.05
6. Step 6: Final answer
   x = 155,532,455.18