Finding the Fourth Proportional to 139,828,215.78, 209,742,987.06 and 42,783,768.59

Step by Step Solution

1. Step 1: Write the proportion equation
   139,828,215.78 : 209,742,987.06 = 42,783,768.59 : x
2. Step 2: Convert to fraction form
   139,828,215.78/209,742,987.06 = 42,783,768.59/x
3. Step 3: Cross multiply
   139,828,215.78x = 209,742,987.06 × 42,783,768.59
4. Step 4: Simplify right side
   139,828,215.78x = 8,973,595,420,701,690
5. Step 5: Solve for x
   x = 8,973,595,420,701,690/139,828,215.78
6. Step 6: Final answer
   x = 64,175,855.86