Finding the Fourth Proportional to 256,131,501.56, 353,461,586.27 and 138,656,828.00

Step by Step Solution

1. Step 1: Write the proportion equation
   256,131,501.56 : 353,461,586.27 = 138,656,828.00 : x
2. Step 2: Convert to fraction form
   256,131,501.56/353,461,586.27 = 138,656,828.00/x
3. Step 3: Cross multiply
   256,131,501.56x = 353,461,586.27 × 138,656,828.00
4. Step 4: Simplify right side
   256,131,501.56x = 49,009,862,369,585,960
5. Step 5: Solve for x
   x = 49,009,862,369,585,960/256,131,501.56
6. Step 6: Final answer
   x = 191,346,484.41