Finding the Fourth Proportional to 123,609,290.18, 170,589,442.25 and 81,720,577.47

Step by Step Solution

1. Step 1: Write the proportion equation
   123,609,290.18 : 170,589,442.25 = 81,720,577.47 : x
2. Step 2: Convert to fraction form
   123,609,290.18/170,589,442.25 = 81,720,577.47/x
3. Step 3: Cross multiply
   123,609,290.18x = 170,589,442.25 × 81,720,577.47
4. Step 4: Simplify right side
   123,609,290.18x = 13,940,667,730,546,614
5. Step 5: Solve for x
   x = 13,940,667,730,546,614/123,609,290.18
6. Step 6: Final answer
   x = 112,780,096.96