Finding the Fourth Proportional to 139,581,139.61, 209,379,582.65 and 42,540,013.01

Step by Step Solution

1. Step 1: Write the proportion equation
   139,581,139.61 : 209,379,582.65 = 42,540,013.01 : x
2. Step 2: Convert to fraction form
   139,581,139.61/209,379,582.65 = 42,540,013.01/x
3. Step 3: Cross multiply
   139,581,139.61x = 209,379,582.65 × 42,540,013.01
4. Step 4: Simplify right side
   139,581,139.61x = 8,907,010,170,589,170
5. Step 5: Solve for x
   x = 8,907,010,170,589,170/139,581,139.61
6. Step 6: Final answer
   x = 63,812,419.04