Finding the Fourth Proportional to 139,062,978.19, 208,613,589.15 and 51,617,065

Step by Step Solution

1. Step 1: Write the proportion equation
   139,062,978.19 : 208,613,589.15 = 51,617,065 : x
2. Step 2: Convert to fraction form
   139,062,978.19/208,613,589.15 = 51,617,065/x
3. Step 3: Cross multiply
   139,062,978.19x = 208,613,589.15 × 51,617,065
4. Step 4: Simplify right side
   139,062,978.19x = 10,768,021,191,038,846
5. Step 5: Solve for x
   x = 10,768,021,191,038,846/139,062,978.19
6. Step 6: Final answer
   x = 77,432,695.11