Finding the Fourth Proportional to 173,978,594.32, 260,795,513.02 and 81,697,139.50

Step by Step Solution

1. Step 1: Write the proportion equation
   173,978,594.32 : 260,795,513.02 = 81,697,139.50 : x
2. Step 2: Convert to fraction form
   173,978,594.32/260,795,513.02 = 81,697,139.50/x
3. Step 3: Cross multiply
   173,978,594.32x = 260,795,513.02 × 81,697,139.50
4. Step 4: Simplify right side
   173,978,594.32x = 21,306,247,408,169,008
5. Step 5: Solve for x
   x = 21,306,247,408,169,008/173,978,594.32
6. Step 6: Final answer
   x = 122,464,763.50