Finding the Fourth Proportional to 119,146,159.56, 164,435,014 and 72,129,138.72

Step by Step Solution

1. Step 1: Write the proportion equation
   119,146,159.56 : 164,435,014 = 72,129,138.72 : x
2. Step 2: Convert to fraction form
   119,146,159.56/164,435,014 = 72,129,138.72/x
3. Step 3: Cross multiply
   119,146,159.56x = 164,435,014 × 72,129,138.72
4. Step 4: Simplify right side
   119,146,159.56x = 11,860,555,935,231,142
5. Step 5: Solve for x
   x = 11,860,555,935,231,142/119,146,159.56
6. Step 6: Final answer
   x = 99,546,271.39