Finding the Fourth Proportional to 69,870.18, 105,276.05 and 57,663.61

Step by Step Solution

1. Step 1: Write the proportion equation
   69,870.18 : 105,276.05 = 57,663.61 : x
2. Step 2: Convert to fraction form
   69,870.18/105,276.05 = 57,663.61/x
3. Step 3: Cross multiply
   69,870.18x = 105,276.05 × 57,663.61
4. Step 4: Simplify right side
   69,870.18x = 6,070,596,932.82
5. Step 5: Solve for x
   x = 6,070,596,932.82/69,870.18
6. Step 6: Final answer
   x = 86,883.95