Finding the Fourth Proportional to 23,118,069.78, 31,902,935.72 and 12,805,457.18

Step by Step Solution

1. Step 1: Write the proportion equation
   23,118,069.78 : 31,902,935.72 = 12,805,457.18 : x
2. Step 2: Convert to fraction form
   23,118,069.78/31,902,935.72 = 12,805,457.18/x
3. Step 3: Cross multiply
   23,118,069.78x = 31,902,935.72 × 12,805,457.18
4. Step 4: Simplify right side
   23,118,069.78x = 408,531,677,055,210.50
5. Step 5: Solve for x
   x = 408,531,677,055,210.50/23,118,069.78
6. Step 6: Final answer
   x = 17,671,530.58