Finding the Fourth Proportional to 136,870,426.72, 188,873,966.16 and 78,130,756

Step by Step Solution

1. Step 1: Write the proportion equation
   136,870,426.72 : 188,873,966.16 = 78,130,756 : x
2. Step 2: Convert to fraction form
   136,870,426.72/188,873,966.16 = 78,130,756/x
3. Step 3: Cross multiply
   136,870,426.72x = 188,873,966.16 × 78,130,756
4. Step 4: Simplify right side
   136,870,426.72x = 14,756,865,764,799,216
5. Step 5: Solve for x
   x = 14,756,865,764,799,216/136,870,426.72
6. Step 6: Final answer
   x = 107,816,320.29