Finding the Fourth Proportional to 136,838,359.50, 188,685,616.23 and 87,200,101.50

Step by Step Solution

1. Step 1: Write the proportion equation
   136,838,359.50 : 188,685,616.23 = 87,200,101.50 : x
2. Step 2: Convert to fraction form
   136,838,359.50/188,685,616.23 = 87,200,101.50/x
3. Step 3: Cross multiply
   136,838,359.50x = 188,685,616.23 × 87,200,101.50
4. Step 4: Simplify right side
   136,838,359.50x = 16,453,404,886,846,046
5. Step 5: Solve for x
   x = 16,453,404,886,846,046/136,838,359.50
6. Step 6: Final answer
   x = 120,239,711.63