Finding the Fourth Proportional to 39,870,731, 55,021,630.74 and 21,536,016.50

Step by Step Solution

1. Step 1: Write the proportion equation
   39,870,731 : 55,021,630.74 = 21,536,016.50 : x
2. Step 2: Convert to fraction form
   39,870,731/55,021,630.74 = 21,536,016.50/x
3. Step 3: Cross multiply
   39,870,731x = 55,021,630.74 × 21,536,016.50
4. Step 4: Simplify right side
   39,870,731x = 1,184,946,747,473,547.25
5. Step 5: Solve for x
   x = 1,184,946,747,473,547.25/39,870,731
6. Step 6: Final answer
   x = 29,719,714.63