Finding the Fourth Proportional to 124,131.61, 186,051.57 and 57,430.81

Step by Step Solution

1. Step 1: Write the proportion equation
   124,131.61 : 186,051.57 = 57,430.81 : x
2. Step 2: Convert to fraction form
   124,131.61/186,051.57 = 57,430.81/x
3. Step 3: Cross multiply
   124,131.61x = 186,051.57 × 57,430.81
4. Step 4: Simplify right side
   124,131.61x = 10,685,092,366.87
5. Step 5: Solve for x
   x = 10,685,092,366.87/124,131.61
6. Step 6: Final answer
   x = 86,078.74