Finding the Fourth Proportional to 257,111,187.27, 354,835,320.72 and 145,621,861.14

Step by Step Solution

1. Step 1: Write the proportion equation
   257,111,187.27 : 354,835,320.72 = 145,621,861.14 : x
2. Step 2: Convert to fraction form
   257,111,187.27/354,835,320.72 = 145,621,861.14/x
3. Step 3: Cross multiply
   257,111,187.27x = 354,835,320.72 × 145,621,861.14
4. Step 4: Simplify right side
   257,111,187.27x = 51,671,779,801,455,200
5. Step 5: Solve for x
   x = 51,671,779,801,455,200/257,111,187.27
6. Step 6: Final answer
   x = 200,970,562.00