Finding the Fourth Proportional to 139,968,016.68, 209,952,025.01 and 103,688,311.08

Step by Step Solution

1. Step 1: Write the proportion equation
   139,968,016.68 : 209,952,025.01 = 103,688,311.08 : x
2. Step 2: Convert to fraction form
   139,968,016.68/209,952,025.01 = 103,688,311.08/x
3. Step 3: Cross multiply
   139,968,016.68x = 209,952,025.01 × 103,688,311.08
4. Step 4: Simplify right side
   139,968,016.68x = 21,769,570,881,112,820
5. Step 5: Solve for x
   x = 21,769,570,881,112,820/139,968,016.68
6. Step 6: Final answer
   x = 155,532,466.61