Finding the Third Proportional to 139,041,858.50 and 210,352,300

Step by Step Solution

1. Step 1: Write the proportion equation
   139,041,858.50 : 210,352,300 = 210,352,300 : x
2. Step 2: Convert to fraction form
   139,041,858.50/210,352,300 = 210,352,300/x
3. Step 3: Cross multiply
   139,041,858.50x = 210,352,300 × 210,352,300
4. Step 4: Simplify right side
   139,041,858.50x = 44,248,090,115,290,000
5. Step 5: Solve for x
   x = 44,248,090,115,290,000/139,041,858.50
6. Step 6: Final answer
   x = 318,235,749.96