Finding the Fourth Proportional to 1,148,460.88, 1,584,842.88 and 639,152.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,148,460.88 : 1,584,842.88 = 639,152.32 : x
2. Step 2: Convert to fraction form
   1,148,460.88/1,584,842.88 = 639,152.32/x
3. Step 3: Cross multiply
   1,148,460.88x = 1,584,842.88 × 639,152.32
4. Step 4: Simplify right side
   1,148,460.88x = 1,012,956,003,587.48
5. Step 5: Solve for x
   x = 1,012,956,003,587.48/1,148,460.88
6. Step 6: Final answer
   x = 882,011.76