Finding the Fourth Proportional to 216,646,288.24, 298,971,877.78 and 123,828,789.01

Step by Step Solution

1. Step 1: Write the proportion equation
   216,646,288.24 : 298,971,877.78 = 123,828,789.01 : x
2. Step 2: Convert to fraction form
   216,646,288.24/298,971,877.78 = 123,828,789.01/x
3. Step 3: Cross multiply
   216,646,288.24x = 298,971,877.78 × 123,828,789.01
4. Step 4: Simplify right side
   216,646,288.24x = 37,021,325,573,233,552
5. Step 5: Solve for x
   x = 37,021,325,573,233,552/216,646,288.24
6. Step 6: Final answer
   x = 170,883,728.84