Finding the Fourth Proportional to 127,641.39, 191,462.13 and 57,438.69

Step by Step Solution

1. Step 1: Write the proportion equation
   127,641.39 : 191,462.13 = 57,438.69 : x
2. Step 2: Convert to fraction form
   127,641.39/191,462.13 = 57,438.69/x
3. Step 3: Cross multiply
   127,641.39x = 191,462.13 × 57,438.69
4. Step 4: Simplify right side
   127,641.39x = 10,997,333,931.81
5. Step 5: Solve for x
   x = 10,997,333,931.81/127,641.39
6. Step 6: Final answer
   x = 86,158.06