Finding the Fourth Proportional to 1,432,691.49, 1,977,072.12 and 788,111.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,432,691.49 : 1,977,072.12 = 788,111.31 : x
2. Step 2: Convert to fraction form
   1,432,691.49/1,977,072.12 = 788,111.31/x
3. Step 3: Cross multiply
   1,432,691.49x = 1,977,072.12 × 788,111.31
4. Step 4: Simplify right side
   1,432,691.49x = 1,558,152,898,457.68
5. Step 5: Solve for x
   x = 1,558,152,898,457.68/1,432,691.49
6. Step 6: Final answer
   x = 1,087,570.43