Finding the Fourth Proportional to 56,547, 78,382.71 and 55,605.78

Step by Step Solution

1. Step 1: Write the proportion equation
   56,547 : 78,382.71 = 55,605.78 : x
2. Step 2: Convert to fraction form
   56,547/78,382.71 = 55,605.78/x
3. Step 3: Cross multiply
   56,547x = 78,382.71 × 55,605.78
4. Step 4: Simplify right side
   56,547x = 4,358,531,728.06
5. Step 5: Solve for x
   x = 4,358,531,728.06/56,547
6. Step 6: Final answer
   x = 77,078.04