Finding the Fourth Proportional to 23,139,678.63, 31,932,064.35 and 12,685,337.40

Step by Step Solution

1. Step 1: Write the proportion equation
   23,139,678.63 : 31,932,064.35 = 12,685,337.40 : x
2. Step 2: Convert to fraction form
   23,139,678.63/31,932,064.35 = 12,685,337.40/x
3. Step 3: Cross multiply
   23,139,678.63x = 31,932,064.35 × 12,685,337.40
4. Step 4: Simplify right side
   23,139,678.63x = 405,069,010,158,261.75
5. Step 5: Solve for x
   x = 405,069,010,158,261.75/23,139,678.63
6. Step 6: Final answer
   x = 17,505,386.17