Finding the Fourth Proportional to 13,412,630.72, 18,509,838.72 and 9,499,397.60

Step by Step Solution

1. Step 1: Write the proportion equation
   13,412,630.72 : 18,509,838.72 = 9,499,397.60 : x
2. Step 2: Convert to fraction form
   13,412,630.72/18,509,838.72 = 9,499,397.60/x
3. Step 3: Cross multiply
   13,412,630.72x = 18,509,838.72 × 9,499,397.60
4. Step 4: Simplify right side
   13,412,630.72x = 175,832,317,513,155.06
5. Step 5: Solve for x
   x = 175,832,317,513,155.06/13,412,630.72
6. Step 6: Final answer
   x = 13,109,457.88