Finding the Fourth Proportional to 12,931,329.48, 19,404,556.38 and 7,178,907.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,931,329.48 : 19,404,556.38 = 7,178,907.12 : x
2. Step 2: Convert to fraction form
   12,931,329.48/19,404,556.38 = 7,178,907.12/x
3. Step 3: Cross multiply
   12,931,329.48x = 19,404,556.38 × 7,178,907.12
4. Step 4: Simplify right side
   12,931,329.48x = 139,303,507,956,823.42
5. Step 5: Solve for x
   x = 139,303,507,956,823.42/12,931,329.48
6. Step 6: Final answer
   x = 10,772,558.86