Finding the Fourth Proportional to 151,056, 208,457.28 and 83,988

Step by Step Solution

1. Step 1: Write the proportion equation
   151,056 : 208,457.28 = 83,988 : x
2. Step 2: Convert to fraction form
   151,056/208,457.28 = 83,988/x
3. Step 3: Cross multiply
   151,056x = 208,457.28 × 83,988
4. Step 4: Simplify right side
   151,056x = 17,507,910,032.64
5. Step 5: Solve for x
   x = 17,507,910,032.64/151,056
6. Step 6: Final answer
   x = 115,903.44