Finding the Fourth Proportional to 139,401,482.69, 209,074,667.81 and 132,488,288.21

Step by Step Solution

1. Step 1: Write the proportion equation
   139,401,482.69 : 209,074,667.81 = 132,488,288.21 : x
2. Step 2: Convert to fraction form
   139,401,482.69/209,074,667.81 = 132,488,288.21/x
3. Step 3: Cross multiply
   139,401,482.69x = 209,074,667.81 × 132,488,288.21
4. Step 4: Simplify right side
   139,401,482.69x = 27,699,944,844,513,476
5. Step 5: Solve for x
   x = 27,699,944,844,513,476/139,401,482.69
6. Step 6: Final answer
   x = 198,706,242.65