Finding the Fourth Proportional to 139,923,883.86, 193,095,630.46 and 77,199,978.66

Step by Step Solution

1. Step 1: Write the proportion equation
   139,923,883.86 : 193,095,630.46 = 77,199,978.66 : x
2. Step 2: Convert to fraction form
   139,923,883.86/193,095,630.46 = 77,199,978.66/x
3. Step 3: Cross multiply
   139,923,883.86x = 193,095,630.46 × 77,199,978.66
4. Step 4: Simplify right side
   139,923,883.86x = 14,906,978,550,851,246
5. Step 5: Solve for x
   x = 14,906,978,550,851,246/139,923,883.86
6. Step 6: Final answer
   x = 106,536,340.61