Finding the Fourth Proportional to 249,196.74, 373,572.81 and 91,388.58

Step by Step Solution

1. Step 1: Write the proportion equation
   249,196.74 : 373,572.81 = 91,388.58 : x
2. Step 2: Convert to fraction form
   249,196.74/373,572.81 = 91,388.58/x
3. Step 3: Cross multiply
   249,196.74x = 373,572.81 × 91,388.58
4. Step 4: Simplify right side
   249,196.74x = 34,140,288,632.51
5. Step 5: Solve for x
   x = 34,140,288,632.51/249,196.74
6. Step 6: Final answer
   x = 137,001.35