Finding the Fourth Proportional to 139,968,112.30, 209,952,168.45 and 71,817,693.10

Step by Step Solution

1. Step 1: Write the proportion equation
   139,968,112.30 : 209,952,168.45 = 71,817,693.10 : x
2. Step 2: Convert to fraction form
   139,968,112.30/209,952,168.45 = 71,817,693.10/x
3. Step 3: Cross multiply
   139,968,112.30x = 209,952,168.45 × 71,817,693.10
4. Step 4: Simplify right side
   139,968,112.30x = 15,078,280,399,421,600
5. Step 5: Solve for x
   x = 15,078,280,399,421,600/139,968,112.30
6. Step 6: Final answer
   x = 107,726,539.65