Finding the Fourth Proportional to 123,069,139.20, 169,887,705.36 and 76,682,311.32

Step by Step Solution

1. Step 1: Write the proportion equation
   123,069,139.20 : 169,887,705.36 = 76,682,311.32 : x
2. Step 2: Convert to fraction form
   123,069,139.20/169,887,705.36 = 76,682,311.32/x
3. Step 3: Cross multiply
   123,069,139.20x = 169,887,705.36 × 76,682,311.32
4. Step 4: Simplify right side
   123,069,139.20x = 13,027,381,911,855,952
5. Step 5: Solve for x
   x = 13,027,381,911,855,952/123,069,139.20
6. Step 6: Final answer
   x = 105,854,172.68