Finding the Fourth Proportional to 13,157,139.78, 19,697,225.30 and 7,675,473.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,157,139.78 : 19,697,225.30 = 7,675,473.50 : x
2. Step 2: Convert to fraction form
   13,157,139.78/19,697,225.30 = 7,675,473.50/x
3. Step 3: Cross multiply
   13,157,139.78x = 19,697,225.30 × 7,675,473.50
4. Step 4: Simplify right side
   13,157,139.78x = 151,185,530,676,816.06
5. Step 5: Solve for x
   x = 151,185,530,676,816.06/13,157,139.78
6. Step 6: Final answer
   x = 11,490,759.63