Finding the Fourth Proportional to 139,142,076.12, 192,033,779.70 and 84,138,326.28

Step by Step Solution

1. Step 1: Write the proportion equation
   139,142,076.12 : 192,033,779.70 = 84,138,326.28 : x
2. Step 2: Convert to fraction form
   139,142,076.12/192,033,779.70 = 84,138,326.28/x
3. Step 3: Cross multiply
   139,142,076.12x = 192,033,779.70 × 84,138,326.28
4. Step 4: Simplify right side
   139,142,076.12x = 16,157,400,813,180,240
5. Step 5: Solve for x
   x = 16,157,400,813,180,240/139,142,076.12
6. Step 6: Final answer
   x = 116,121,602.20