Finding the Fourth Proportional to 77,724, 107,259.12 and 42,396

Step by Step Solution

1. Step 1: Write the proportion equation
   77,724 : 107,259.12 = 42,396 : x
2. Step 2: Convert to fraction form
   77,724/107,259.12 = 42,396/x
3. Step 3: Cross multiply
   77,724x = 107,259.12 × 42,396
4. Step 4: Simplify right side
   77,724x = 4,547,357,651.52
5. Step 5: Solve for x
   x = 4,547,357,651.52/77,724
6. Step 6: Final answer
   x = 58,506.48