Finding the Fourth Proportional to 139,959,344.49, 193,143,978.54 and 78,079,683.12

Step by Step Solution

1. Step 1: Write the proportion equation
   139,959,344.49 : 193,143,978.54 = 78,079,683.12 : x
2. Step 2: Convert to fraction form
   139,959,344.49/193,143,978.54 = 78,079,683.12/x
3. Step 3: Cross multiply
   139,959,344.49x = 193,143,978.54 × 78,079,683.12
4. Step 4: Simplify right side
   139,959,344.49x = 15,080,620,640,939,280
5. Step 5: Solve for x
   x = 15,080,620,640,939,280/139,959,344.49
6. Step 6: Final answer
   x = 107,750,009.09