Finding the Fourth Proportional to 139,815,929.70, 209,716,285.92 and 42,771,637.34

Step by Step Solution

1. Step 1: Write the proportion equation
   139,815,929.70 : 209,716,285.92 = 42,771,637.34 : x
2. Step 2: Convert to fraction form
   139,815,929.70/209,716,285.92 = 42,771,637.34/x
3. Step 3: Cross multiply
   139,815,929.70x = 209,716,285.92 × 42,771,637.34
4. Step 4: Simplify right side
   139,815,929.70x = 8,969,908,925,661,988
5. Step 5: Solve for x
   x = 8,969,908,925,661,988/139,815,929.70
6. Step 6: Final answer
   x = 64,155,128.42