Finding the Fourth Proportional to 1,111,558.34, 1,533,748.64 and 621,536.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111,558.34 : 1,533,748.64 = 621,536.69 : x
2. Step 2: Convert to fraction form
   1,111,558.34/1,533,748.64 = 621,536.69/x
3. Step 3: Cross multiply
   1,111,558.34x = 1,533,748.64 × 621,536.69
4. Step 4: Simplify right side
   1,111,558.34x = 953,281,042,221.18
5. Step 5: Solve for x
   x = 953,281,042,221.18/1,111,558.34
6. Step 6: Final answer
   x = 857,607.75