Finding the Fourth Proportional to 72,259,742.34, 99,718,192.92 and 39,219,991.35

Step by Step Solution

1. Step 1: Write the proportion equation
   72,259,742.34 : 99,718,192.92 = 39,219,991.35 : x
2. Step 2: Convert to fraction form
   72,259,742.34/99,718,192.92 = 39,219,991.35/x
3. Step 3: Cross multiply
   72,259,742.34x = 99,718,192.92 × 39,219,991.35
4. Step 4: Simplify right side
   72,259,742.34x = 3,910,946,663,760,031.50
5. Step 5: Solve for x
   x = 3,910,946,663,760,031.50/72,259,742.34
6. Step 6: Final answer
   x = 54,123,451.55