Finding the Fourth Proportional to 23,056,406.12, 31,819,487.82 and 12,742,907.78

Step by Step Solution

1. Step 1: Write the proportion equation
   23,056,406.12 : 31,819,487.82 = 12,742,907.78 : x
2. Step 2: Convert to fraction form
   23,056,406.12/31,819,487.82 = 12,742,907.78/x
3. Step 3: Cross multiply
   23,056,406.12x = 31,819,487.82 × 12,742,907.78
4. Step 4: Simplify right side
   23,056,406.12x = 405,472,798,897,093.25
5. Step 5: Solve for x
   x = 405,472,798,897,093.25/23,056,406.12
6. Step 6: Final answer
   x = 17,586,123.21