Finding the Fourth Proportional to 122,008,186.56, 168,309,039.96 and 77,908,818.72

Step by Step Solution

1. Step 1: Write the proportion equation
   122,008,186.56 : 168,309,039.96 = 77,908,818.72 : x
2. Step 2: Convert to fraction form
   122,008,186.56/168,309,039.96 = 77,908,818.72/x
3. Step 3: Cross multiply
   122,008,186.56x = 168,309,039.96 × 77,908,818.72
4. Step 4: Simplify right side
   122,008,186.56x = 13,112,758,483,180,876
5. Step 5: Solve for x
   x = 13,112,758,483,180,876/122,008,186.56
6. Step 6: Final answer
   x = 107,474,415.06