Finding the Fourth Proportional to 388,864,326.30, 536,674,357.27 and 238,256,931.50

Step by Step Solution

1. Step 1: Write the proportion equation
   388,864,326.30 : 536,674,357.27 = 238,256,931.50 : x
2. Step 2: Convert to fraction form
   388,864,326.30/536,674,357.27 = 238,256,931.50/x
3. Step 3: Cross multiply
   388,864,326.30x = 536,674,357.27 × 238,256,931.50
4. Step 4: Simplify right side
   388,864,326.30x = 127,866,385,578,179,008
5. Step 5: Solve for x
   x = 127,866,385,578,179,008/388,864,326.30
6. Step 6: Final answer
   x = 328,820,045.78