Finding the Fourth Proportional to 266,064,216.69, 364,501,887.84 and 256,116,658.12

Step by Step Solution

1. Step 1: Write the proportion equation
   266,064,216.69 : 364,501,887.84 = 256,116,658.12 : x
2. Step 2: Convert to fraction form
   266,064,216.69/364,501,887.84 = 256,116,658.12/x
3. Step 3: Cross multiply
   266,064,216.69x = 364,501,887.84 × 256,116,658.12
4. Step 4: Simplify right side
   266,064,216.69x = 93,355,005,391,507,056
5. Step 5: Solve for x
   x = 93,355,005,391,507,056/266,064,216.69
6. Step 6: Final answer
   x = 350,873,960.26