Finding the Fourth Proportional to 101,187,428.72, 139,638,622.20 and 54,777,648.56

Step by Step Solution

1. Step 1: Write the proportion equation
   101,187,428.72 : 139,638,622.20 = 54,777,648.56 : x
2. Step 2: Convert to fraction form
   101,187,428.72/139,638,622.20 = 54,777,648.56/x
3. Step 3: Cross multiply
   101,187,428.72x = 139,638,622.20 × 54,777,648.56
4. Step 4: Simplify right side
   101,187,428.72x = 7,649,075,372,274,214
5. Step 5: Solve for x
   x = 7,649,075,372,274,214/101,187,428.72
6. Step 6: Final answer
   x = 75,593,139.08